caboodle/

adapter.rs

// Compatibility: retained library imports, persisted paths, environment keys and
// explicit old-command/version probes remain readable during the product rename.
use std::{
    env,
    ffi::{OsStr, OsString},
    fs,
    path::{Path, PathBuf},
    process::{Command, Output},
    time::{SystemTime, UNIX_EPOCH},
};

use anyhow::{bail, Context, Result};
use serde_json::{json, Value};

use crate::model::{QuipuFlavor, ToolName};

mod manifest;
mod quipu_alias;
pub(crate) use manifest::{
    find_program, identify_member, prove_release, release_target, single_program, stage, verify_at,
};

pub trait Adapter {
    fn name(&self) -> ToolName;
    /// Release identity reviewed and pinned by this Tambo build.
    fn desired_version(&self) -> String;
    fn install(&self) -> Result<()>;
    fn version(&self) -> Result<String>;
    fn verify(&self) -> Result<()>;

    /// Bind package verification to the executables PATH actually runs. Most
    /// adapters already use PATH; Quipu and manifest members normally prefer
    /// their managed Cargo install.
    fn package_adapter(&self) -> Result<Option<Box<dyn Adapter>>> {
        Ok(None)
    }

    fn is_current(&self, installed: &str) -> bool {
        installed == self.desired_version()
    }
}

/// Why `install` cannot fetch a reviewed artifact for this host, if it cannot.
/// Read-only: it inspects the platform, never the network. The same target
/// functions drive the installers, so the answer cannot drift from them.
pub fn release_blocker(name: ToolName, quipu_flavor: QuipuFlavor) -> Option<String> {
    let result = match name {
        ToolName::Quipu if quipu_flavor == QuipuFlavor::Release => quipu_release_target(),
        ToolName::Bobbin => bobbin_release_target(),
        ToolName::Yupana => yupana_release_target(),
        ToolName::Member(name) => match crate::members::get(name) {
            Some(m) => manifest::release_target(m),
            None => return Some(format!("unknown stack member {name}")),
        },
        // Camayoc is a source archive, Desire Path and the lancedb Quipu
        // flavor are source builds: their blockers are missing prerequisites.
        // Named, never a wildcard: a new variant must decide (aegis-1i5h1j).
        ToolName::Quipu | ToolName::Camayoc | ToolName::DesirePath => return None,
    };
    result.err().map(|error| format!("{error:#}"))
}

/// Host commands the install and verification steps of one tool shell out to.
pub fn prerequisites(name: ToolName, quipu_flavor: QuipuFlavor) -> &'static [&'static str] {
    match name {
        ToolName::Quipu if quipu_flavor == QuipuFlavor::Lancedb => &["cargo"],
        ToolName::Quipu => &["curl", "tar"],
        // Camayoc's bootstrap is bash + python3, and it talks to Quipu with curl.
        // Checksums are computed in-process (aegis-em2.2): macOS ships sha256sum
        // only in /sbin, which a LaunchAgent PATH need not contain.
        ToolName::Camayoc => &["curl", "tar", "bash", "python3"],
        ToolName::Bobbin => &["curl", "tar", "git"],
        ToolName::Yupana => &["curl", "tar"],
        ToolName::DesirePath => &["go"],
        ToolName::Member(name) => crate::members::prerequisites(name),
    }
}

/// The reviewed source build to run by hand where no release exists for a host.
pub fn source_install_command(name: ToolName) -> Option<String> {
    match name {
        ToolName::Quipu => Some(format!("cargo {}", quipu_install_args(QuipuFlavor::Release).join(" "))),
        ToolName::Yupana => Some(format!(
            "cargo install --git https://github.com/scbrown/yupana --tag v{YUPANA_VERSION} --locked --features mcp"
        )),
        // A member installs only its reviewed release; there is no source path.
        ToolName::Camayoc | ToolName::Bobbin | ToolName::DesirePath | ToolName::Member(_) => None,
    }
}

/// Executables a tool puts on PATH, in the order a shell would look them up.
pub fn programs(name: ToolName) -> &'static [&'static str] {
    match name {
        ToolName::Quipu => &["qp", "quipu", "quipu-server"],
        ToolName::Camayoc => &[],
        ToolName::Bobbin => &["bobbin"],
        ToolName::Yupana => &["yupana"],
        ToolName::DesirePath => &["dp"],
        ToolName::Member(name) => crate::members::programs(name),
    }
}

/// Every executable named `program` on `path`, in lookup order.
pub fn which_all(program: &str, path: Option<&std::ffi::OsStr>) -> Vec<PathBuf> {
    let Some(path) = path else {
        return Vec::new();
    };
    let mut found: Vec<PathBuf> = Vec::new();
    let mut targets: Vec<PathBuf> = Vec::new();
    for candidate in env::split_paths(path).map(|directory| directory.join(program)) {
        if !is_executable(&candidate) {
            continue;
        }
        // A directory listed twice, or a symlink to a copy already seen, is the
        // same binary rather than a shadowing one.
        let target = candidate
            .canonicalize()
            .unwrap_or_else(|_| candidate.clone());
        if !targets.contains(&target) {
            targets.push(target);
            found.push(candidate);
        }
    }
    found
}

pub(crate) fn is_executable(path: &Path) -> bool {
    let Ok(metadata) = path.metadata() else {
        return false;
    };
    if !metadata.is_file() {
        return false;
    }
    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt;
        metadata.permissions().mode() & 0o111 != 0
    }
    #[cfg(not(unix))]
    true
}

/// What a shell actually runs for one managed program (aegis-70qlhs).
///
/// Versions are read from the MANAGED copy (`$CARGO_HOME/bin`), so a stale
/// binary earlier on PATH can make `verify` report a tool current while the
/// user runs something else. That happened: a fresh `cargo install` exited 0,
/// the new binary sat on disk, and an older copy in `~/.local/bin` kept
/// answering. Nothing said which copy ran.
#[derive(Debug, PartialEq, Eq)]
pub enum PathResolution {
    /// PATH runs the managed copy, or there is no managed copy to compare.
    Managed,
    /// The program is not on PATH at all.
    NotOnPath,
    /// PATH runs a different file that reports the same `--version`.
    SameBuild { runs: PathBuf, managed: PathBuf },
    /// PATH runs a different file that reports a different `--version`.
    Shadowed {
        runs: PathBuf,
        runs_version: String,
        managed: PathBuf,
        managed_version: String,
    },
}

/// Resolve `program` the way a shell would, against the managed copy.
pub fn path_resolution(program: &str, path: Option<&OsStr>) -> PathResolution {
    let Some(managed) = managed_bin_dir().map(|dir| dir.join(program)) else {
        return PathResolution::Managed;
    };
    if !is_executable(&managed) {
        return PathResolution::Managed;
    }
    let Some(runs) = which_all(program, path).into_iter().next() else {
        return PathResolution::NotOnPath;
    };
    let canonical = |p: &Path| p.canonicalize().unwrap_or_else(|_| p.to_path_buf());
    if canonical(&runs) == canonical(&managed) {
        return PathResolution::Managed;
    }
    let version = |p: &Path| {
        p.to_str()
            .and_then(|s| read_version(s).ok())
            .unwrap_or_else(|| "unreadable".to_owned())
    };
    let (runs_version, managed_version) = (version(&runs), version(&managed));
    if runs_version == managed_version {
        PathResolution::SameBuild { runs, managed }
    } else {
        PathResolution::Shadowed {
            runs,
            runs_version,
            managed,
            managed_version,
        }
    }
}

/// Where the release and cargo installers write binaries.
pub fn managed_bin_dir() -> Option<PathBuf> {
    env::var_os("CARGO_HOME")
        .map(PathBuf::from)
        .or_else(|| env::var_os("HOME").map(|home| PathBuf::from(home).join(".cargo")))
        .map(|home| home.join("bin"))
}

pub fn adapter(name: ToolName, quipu_flavor: QuipuFlavor) -> Box<dyn Adapter> {
    match name {
        ToolName::Quipu => Box::new(Quipu {
            flavor: quipu_flavor,
            external: None,
        }),
        ToolName::Camayoc => Box::new(Camayoc),
        ToolName::Bobbin => Box::new(Bobbin),
        ToolName::Yupana => Box::new(Yupana),
        ToolName::DesirePath => Box::new(DesirePath),
        ToolName::Member(name) => Box::new(manifest::ManifestAdapter(
            crate::members::get(name)
                .expect("a Member name is only minted for an embedded manifest"),
        )),
    }
}

/// Resolve external binaries once so identity and round trips use the same files.
pub fn adapter_for_plan(name: ToolName, plan: &crate::model::Plan) -> Result<Box<dyn Adapter>> {
    if name != ToolName::Quipu || !plan.external_quipu {
        return Ok(adapter(name, plan.quipu_flavor));
    }
    let path = env::var_os("PATH");
    let resolve = |name| -> Result<PathBuf> {
        which_all(name, path.as_deref())
            .into_iter()
            .next()
            .with_context(|| format!("external Quipu requires {name} on PATH"))?
            .canonicalize()
            .with_context(|| format!("resolve external {name}"))
    };
    Ok(Box::new(Quipu {
        flavor: plan.quipu_flavor,
        external: Some((resolve("quipu")?, resolve("quipu-server")?)),
    }))
}

fn output<P, I, S>(program: P, args: I, cwd: Option<&Path>) -> Result<Output>
where
    P: AsRef<OsStr>,
    I: IntoIterator<Item = S>,
    S: AsRef<OsStr>,
{
    let args: Vec<OsString> = args
        .into_iter()
        .map(|arg| arg.as_ref().to_os_string())
        .collect();
    let program = program.as_ref();
    let mut command = Command::new(program);
    command.args(&args);
    if let Some(cwd) = cwd {
        command.current_dir(cwd);
    }
    command.output().with_context(|| {
        format!(
            "run {} {}",
            program.to_string_lossy(),
            args.iter()
                .map(|arg| arg.to_string_lossy())
                .collect::<Vec<_>>()
                .join(" ")
        )
    })
}

pub(crate) fn checked<P, I, S>(program: P, args: I, cwd: Option<&Path>) -> Result<Output>
where
    P: AsRef<OsStr>,
    I: IntoIterator<Item = S>,
    S: AsRef<OsStr>,
{
    let program = program.as_ref();
    let result = output(program, args, cwd)?;
    if !result.status.success() {
        bail!(
            "{} failed ({})\nstdout:\n{}\nstderr:\n{}",
            program.to_string_lossy(),
            result.status,
            String::from_utf8_lossy(&result.stdout).trim(),
            String::from_utf8_lossy(&result.stderr).trim()
        );
    }
    Ok(result)
}

fn read_version(program: &str) -> Result<String> {
    let result = checked(program, ["--version"], None)?;
    let version = String::from_utf8_lossy(&result.stdout).trim().to_owned();
    if version.is_empty() {
        bail!("{} --version returned no version", program);
    }
    Ok(version)
}

fn read_cargo_version(program: &str) -> Result<String> {
    let program_path = cargo_program(program);
    read_version(
        program_path
            .to_str()
            .with_context(|| format!("{} path is not valid UTF-8", program_path.display()))?,
    )
}

fn cargo_program(program: &str) -> PathBuf {
    let cargo_home = env::var_os("CARGO_HOME")
        .map(PathBuf::from)
        .or_else(|| env::var_os("HOME").map(|home| PathBuf::from(home).join(".cargo")));
    if let Some(path) = cargo_home.map(|home| home.join("bin").join(program)) {
        if path.is_file() {
            return path;
        }
    }
    PathBuf::from(program)
}

fn require_minimum_version(output: &str, minimum: (u64, u64, u64), program: &str) -> Result<()> {
    let raw = output
        .split_whitespace()
        .nth(1)
        .with_context(|| format!("{program} --version omitted a semantic version"))?;
    let mut parts = raw.trim_start_matches('v').split('.');
    let found = (
        parts.next().and_then(|value| value.parse().ok()),
        parts.next().and_then(|value| value.parse().ok()),
        parts.next().and_then(|value| value.parse().ok()),
    );
    let found = match found {
        (Some(major), Some(minor), Some(patch)) => (major, minor, patch),
        _ => bail!("{program} returned an invalid semantic version: {raw}"),
    };
    if found < minimum {
        bail!(
            "{program} {}.{}.{} is too old; Tambo requires at least {}.{}.{}",
            found.0,
            found.1,
            found.2,
            minimum.0,
            minimum.1,
            minimum.2
        );
    }
    Ok(())
}

struct Quipu {
    flavor: QuipuFlavor,
    external: Option<(PathBuf, PathBuf)>,
}

const QUIPU_VERSION: &str = "0.9.0";

/// The reviewed feature set per flavor. Both flavors build the identical
/// pinned revision — only the feature list differs — so choosing `lancedb`
/// can never smuggle in an unreviewed Quipu.
fn quipu_features(flavor: QuipuFlavor) -> &'static str {
    match flavor {
        QuipuFlavor::Release => "full",
        QuipuFlavor::Lancedb => "full,lancedb",
    }
}

impl Adapter for Quipu {
    fn package_adapter(&self) -> Result<Option<Box<dyn Adapter>>> {
        let path = env::var_os("PATH");
        let resolve = |name| {
            which_all(name, path.as_deref())
                .into_iter()
                .next()
                .with_context(|| format!("package Quipu requires {name} on PATH"))
        };
        // Keep the package-manager symlinks rather than the old Cellar targets:
        // brew may replace both targets during this same update.
        Ok(Some(Box::new(Self {
            flavor: self.flavor,
            external: Some((resolve("quipu")?, resolve("quipu-server")?)),
        })))
    }

    fn name(&self) -> ToolName {
        ToolName::Quipu
    }

    fn desired_version(&self) -> String {
        match self.flavor {
            QuipuFlavor::Release => format!("quipu {QUIPU_VERSION}; quipu-server {QUIPU_VERSION}"),
            QuipuFlavor::Lancedb => {
                format!("quipu {QUIPU_VERSION}; quipu-server {QUIPU_VERSION} (+lancedb)")
            }
        }
    }

    fn is_current(&self, _installed: &str) -> bool {
        // version() already enforces the reviewed minimum for both binaries;
        // a newer compatible Quipu release is not a downgrade candidate.
        // Flavor drift is invisible here — `quipu --version` cannot say which
        // features were compiled in — so verify() is what catches it.
        true
    }

    fn install(&self) -> Result<()> {
        if self.external.is_some() {
            bail!("external Quipu is not owned by Tambo; installation refused");
        }
        preflight_owned_quipu_alias()?;
        match self.flavor {
            QuipuFlavor::Release => install_quipu_release(),
            // The published archive is the reviewed `full` build. LanceDB is
            // an explicit non-default flavor and still needs a source build
            // until Quipu publishes a separately identifiable artifact.
            QuipuFlavor::Lancedb => {
                let mut args: Vec<OsString> = quipu_install_args(self.flavor)
                    .iter()
                    .map(OsString::from)
                    .collect();
                args.push("--root".into());
                args.push(
                    owned_quipu_bin()?
                        .parent()
                        .context("cargo bin has no root")?
                        .as_os_str()
                        .into(),
                );
                checked("cargo", args, None)?;
                ensure_owned_quipu_alias()
            }
        }
    }

    fn version(&self) -> Result<String> {
        // `cargo install` writes these binaries under CARGO_HOME, which may be
        // later on PATH than a legacy Quipu install. Read back the location we
        // actually update so a successful install cannot be reported as stale.
        let client = if let Some((client, _)) = &self.external {
            read_version(
                client
                    .to_str()
                    .context("external Quipu path is not UTF-8")?,
            )?
        } else {
            read_cargo_version("quipu")?
        };
        require_minimum_version(&client, (0, 3, 27), "quipu")?;
        let server = if let Some((_, server)) = &self.external {
            read_version(
                server
                    .to_str()
                    .context("external server path is not UTF-8")?,
            )?
        } else {
            read_cargo_version("quipu-server")?
        };
        require_minimum_version(&server, (0, 3, 27), "quipu-server")?;
        Ok(match &self.external {
            Some((c, s)) => format!(
                "{client}; {server}; external executables: {} | {}",
                c.display(),
                s.display()
            ),
            None => format!("{client}; {server}"),
        })
    }

    fn verify(&self) -> Result<()> {
        let client = self
            .external
            .as_ref()
            .map(|(c, _)| c.clone())
            .map(Ok)
            .unwrap_or_else(selected_quipu_client)?;
        verify_quipu_alias(&client)?;
        self.verify_core()
    }
}

impl Quipu {
    fn verify_core(&self) -> Result<()> {
        if self.flavor == QuipuFlavor::Lancedb {
            verify_quipu_lancedb_feature()?;
        }
        let client = self
            .external
            .as_ref()
            .map(|(client, _)| client.as_path())
            .unwrap_or_else(|| Path::new("quipu"));
        let root = tempfile::tempdir().context("create quipu verification directory")?;
        let db = root.path().join("verify.db");
        let episode = root.path().join("episode.json");
        let marker = "tambo-verify-roundtrip";
        fs::write(
            &episode,
            format!(
                r#"{{"name":"Tambo verification","episode_body":"functional round trip","source":"caboodle","group_id":"caboodle-verification","nodes":[{{"name":"{marker}","type":"Verification","description":"Tambo isolated verification"}}],"edges":[]}}"#
            ),
        )
        .context("write quipu verification episode")?;

        let query = format!(
            "SELECT ?s ?label WHERE {{ ?s <http://www.w3.org/2000/01/rdf-schema#label> ?label . FILTER(?label = \"{marker}\") }}"
        );
        let before = checked(
            client,
            [
                OsStr::new("read"),
                OsStr::new(&query),
                OsStr::new("--db"),
                db.as_os_str(),
            ],
            None,
        )?;
        if String::from_utf8_lossy(&before.stdout).contains(marker) {
            bail!("quipu negative control unexpectedly found the verification node");
        }

        checked(
            client,
            [
                OsStr::new("episode"),
                episode.as_os_str(),
                OsStr::new("--base-ns"),
                OsStr::new("https://example.org/tambo/verification/"),
                OsStr::new("--db"),
                db.as_os_str(),
            ],
            None,
        )?;
        let after = checked(
            client,
            [
                OsStr::new("read"),
                OsStr::new(&query),
                OsStr::new("--db"),
                db.as_os_str(),
            ],
            None,
        )?;
        if !String::from_utf8_lossy(&after.stdout).contains(marker) {
            bail!("quipu episode landed but read-back did not find the verification node");
        }
        // The stack's shared vocabulary rides with Quipu: the pinned Quechua
        // release must load and resolve a term, with an absent-term control.
        crate::vocabulary::verify_at(client).context("Quechua vocabulary verification")?;
        Ok(())
    }
}

/// Prove exactly the selected pair, using a throwaway client store, never a live server.
pub(crate) fn verify_quipu_pair(client: &Path, server: &Path) -> Result<()> {
    Quipu {
        flavor: QuipuFlavor::Release,
        external: Some((client.to_path_buf(), server.to_path_buf())),
    }
    .verify_core()?;
    let help = checked(server, ["--help"], None)?;
    let help = String::from_utf8_lossy(&help.stdout);
    if !help.contains("--db") || !help.contains("--bind") {
        bail!("Quipu server omitted isolated database/bind command contract");
    }
    Ok(())
}

pub(crate) fn quipu_release_target() -> Result<&'static str> {
    quipu_release_target_for(env::consts::ARCH, env::consts::OS)
}

fn quipu_release_target_for(arch: &str, os: &str) -> Result<&'static str> {
    match (arch, os) {
        ("x86_64", "linux") => Ok("x86_64-unknown-linux-gnu"),
        ("aarch64", "linux") => Ok("aarch64-unknown-linux-gnu"),
        ("x86_64", "macos") => Ok("x86_64-apple-darwin"),
        ("aarch64", "macos") => Ok("aarch64-apple-darwin"),
        (arch, os) => bail!("Quipu has no checksummed Tambo release for {arch}-{os}"),
    }
}

fn fetch_quipu_release(target: &str, download: &Path) -> Result<PathBuf> {
    // release-please tags the crate package; the release workflow prefixes
    // that complete tag again for both the asset and its top-level directory.
    let tag = format!("quipu-ai-v{QUIPU_VERSION}");
    let directory = format!("quipu-{tag}-{target}");
    let archive_name = format!("{directory}.tar.gz");
    let base = format!("https://github.com/scbrown/quipu/releases/download/{tag}");
    let archive = download.join(&archive_name);
    let checksum = download.join(format!("{archive_name}.sha256"));
    download_https(&format!("{base}/{archive_name}"), &archive)?;
    download_https(&format!("{base}/{archive_name}.sha256"), &checksum)?;
    verify_checksum(&archive, &checksum)?;

    let unpacked = download.join(directory);
    checked(
        "tar",
        [
            OsStr::new("-xzf"),
            archive.as_os_str(),
            OsStr::new("-C"),
            download.as_os_str(),
        ],
        None,
    )?;
    for program in ["quipu", "quipu-server"] {
        if !unpacked.join(program).is_file() {
            bail!("Quipu release archive omitted {program}");
        }
    }
    if !fs::symlink_metadata(unpacked.join("quipu"))?
        .file_type()
        .is_file()
    {
        bail!("Quipu primary archive executable must be regular");
    }
    crate::quipu_layout::alias(&unpacked.join("quipu-server"))?;
    Ok(unpacked)
}

fn install_quipu_release() -> Result<()> {
    let target = quipu_release_target()?;
    let download = tempfile::tempdir().context("create Quipu download directory")?;
    let unpacked = fetch_quipu_release(target, download.path())?;
    let home = env::var_os("HOME").context("HOME is required to install Quipu")?;
    let bin = env::var_os("CARGO_HOME")
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from(home).join(".cargo"))
        .join("bin");
    fs::create_dir_all(&bin).with_context(|| format!("create {}", bin.display()))?;
    // Old reviewed releases keep their two regular executables. A unified
    // archive installs one regular artifact and one exact relative alias.
    let unified = crate::quipu_layout::alias(&unpacked.join("quipu-server"))?.is_some();
    for program in if unified {
        &["quipu"][..]
    } else {
        &["quipu", "quipu-server"][..]
    } {
        crate::quipu_layout::replace_regular(&unpacked.join(program), &bin.join(program))?;
    }
    if unified {
        crate::quipu_layout::replace_alias(&bin.join("quipu-server"))?;
    }
    ensure_owned_quipu_alias()
}

fn owned_quipu_bin() -> Result<PathBuf> {
    env::var_os("CARGO_HOME")
        .map(PathBuf::from)
        .or_else(|| env::var_os("HOME").map(|h| PathBuf::from(h).join(".cargo")))
        .map(|root| root.join("bin"))
        .context("HOME or CARGO_HOME is required for owned Quipu installation")
}

pub(crate) fn preflight_owned_quipu_alias() -> Result<()> {
    quipu_alias::preflight(&owned_quipu_bin()?).map_err(anyhow::Error::msg)
}

pub(crate) fn ensure_owned_quipu_alias() -> Result<()> {
    quipu_alias::ensure(&owned_quipu_bin()?).map_err(anyhow::Error::msg)
}

/// Post-install self-healing for the owned Quipu directory only; an externally
/// installed Quipu elsewhere is never touched (aegis-61f).
#[cfg(unix)]
pub fn repair_owned_quipu_alias() -> Result<String> {
    use quipu_alias::Repair;
    let bin = owned_quipu_bin()?;
    let qp = bin.join("qp");
    Ok(
        match quipu_alias::repair(&bin).map_err(anyhow::Error::msg)? {
            Repair::NoQuipu => format!("no owned quipu in {}; nothing to repair", bin.display()),
            Repair::Current => format!("{} -> quipu already current", qp.display()),
            Repair::Created => format!("created {} -> quipu", qp.display()),
            Repair::Retargeted => format!("retargeted {} -> quipu", qp.display()),
            Repair::ForeignPreserved => format!(
                "{} is not a symlink; preserved it, qp NOT repaired",
                qp.display()
            ),
            Repair::PackageManaged(package) => format!(
                "quipu in {} is managed by apt (package {package}); qp left to the package",
                bin.display()
            ),
        },
    )
}

fn selected_quipu_client() -> Result<PathBuf> {
    let owned = cargo_program("quipu");
    if owned.is_file() {
        return Ok(owned);
    }
    which_all("quipu", env::var_os("PATH").as_deref())
        .into_iter()
        .next()
        .context("Quipu CLI is not on PATH")
}

pub(crate) fn ensure_existing_quipu_alias() -> Result<()> {
    let client = selected_quipu_client()?;
    let bin = client
        .parent()
        .context("selected Quipu CLI has no directory")?;
    quipu_alias::ensure(bin).map_err(anyhow::Error::msg)
}

pub(crate) fn verify_existing_quipu_alias() -> Result<()> {
    verify_quipu_alias(&selected_quipu_client()?)
}

fn verify_quipu_alias(client: &Path) -> Result<()> {
    let bin = client.parent().context("Quipu CLI has no directory")?;
    let alias = bin.join("qp");
    let resolved = client.canonicalize()?;
    let resolved_bin = resolved.parent().context("Quipu CLI has no directory")?;
    // The relative link may sit beside the selected quipu or beside the file it
    // resolves to: a package manager (Homebrew) links bin/ into its own tree,
    // and the formula owns `qp -> quipu` there (aegis-6f1).
    let relative =
        |dir: &Path| fs::read_link(dir.join("qp")).ok().as_deref() == Some(Path::new("quipu"));
    if !relative(bin) && !relative(resolved_bin) {
        bail!(
            "Quipu verification requires relative qp -> quipu in {}",
            bin.display()
        );
    }
    // The qp a user types (beside the selected quipu) must be the same program.
    if alias.canonicalize().ok().as_deref() != Some(resolved.as_path()) {
        bail!("qp and quipu do not resolve to the same executable");
    }
    if read_version(alias.to_str().context("qp path is not UTF-8")?)?
        != read_version(client.to_str().context("Quipu path is not UTF-8")?)?
    {
        bail!("qp and quipu version outputs disagree");
    }
    Ok(())
}

fn quipu_install_args(flavor: QuipuFlavor) -> [&'static str; 8] {
    [
        "install",
        "quipu-ai",
        "--version",
        QUIPU_VERSION,
        "--locked",
        "--features",
        quipu_features(flavor),
        "--bins",
    ]
}

/// The plan asked for the lancedb flavor. `quipu --version` cannot say which
/// features were compiled in, so ask the running server's per-feature compile
/// map — the only read-back that can prove the flavor, as opposed to trusting
/// that `cargo install --features lancedb` exited zero.
fn verify_quipu_lancedb_feature() -> Result<()> {
    let server = env::var("QUIPU_SERVER").unwrap_or_else(|_| "http://localhost:3030".to_owned());
    let version = curl_get_json(&format!("{server}/version"))
        .context("read the Quipu server per-feature compile map")?;
    require_compiled_feature(&version, "lancedb")
}

fn require_compiled_feature(version: &Value, feature: &str) -> Result<()> {
    let compiled = version
        .get("features")
        .and_then(Value::as_object)
        .with_context(|| {
            format!(
                "Quipu /version returned no per-feature compile map; cannot prove the {feature} flavor"
            )
        })?;
    if compiled.get(feature).and_then(Value::as_bool) != Some(true) {
        bail!(
            "the plan requires the {feature} flavor but the running Quipu was compiled without it; \
             reinstall the reviewed revision with `cargo install quipu-ai --version {QUIPU_VERSION} \
             --locked --features full,{feature} --bins`"
        );
    }
    Ok(())
}

struct Bobbin;
struct Yupana;
struct DesirePath;

struct Camayoc;
const BOBBIN_VERSION: &str = "0.30.0";

impl Adapter for Camayoc {
    fn name(&self) -> ToolName {
        ToolName::Camayoc
    }

    fn desired_version(&self) -> String {
        format!("camayoc {CAMAYOC_REVISION}")
    }

    fn install(&self) -> Result<()> {
        install_camayoc_bundle()
    }

    fn version(&self) -> Result<String> {
        let revision = fs::read_to_string(camayoc_root()?.join("REVISION"))
            .context("read installed Camayoc revision")?;
        let revision = revision.trim();
        if revision.is_empty() {
            bail!("installed Camayoc revision is empty");
        }
        Ok(format!("camayoc {revision}"))
    }

    fn verify(&self) -> Result<()> {
        let root = camayoc_root()?;
        // Isolated like every other adapter (aegis-ro425e.2): bootstrap is pointed at a
        // free localhost port inside a tempdir, so it starts its OWN quipu-server from
        // <tempdir>/.quipu instead of loading ontology, shapes and a marker into whatever
        // QUIPU_SERVER names. Bootstrapping the user's real server is a separate, explicit
        // step: run the bundle's scripts/bootstrap.sh yourself.
        let scratch = tempfile::tempdir().context("create Camayoc verification directory")?;
        let port = free_local_port()?;
        let server = format!("http://127.0.0.1:{port}");
        let _guard = ScratchServer(scratch.path().join(".quipu/server.pid"));
        let home = scratch.path().join("home");
        fs::create_dir(&home).context("create Camayoc verification HOME")?;
        let bootstrap = Command::new("bash")
            .arg(root.join("scripts/bootstrap.sh"))
            .current_dir(scratch.path())
            .env("QUIPU_SERVER", &server)
            .env("CLAUDE_PROJECT_DIR", scratch.path())
            .env("HOME", &home)
            .env_remove("XDG_CONFIG_HOME")
            .env_remove("CLAUDE_CONFIG_DIR")
            .env_remove("QUIPU_AUTH_TOKEN_FILE")
            .env_remove("QUIPU_AUTH_TOKEN")
            .output()
            .context("run Camayoc bootstrap against a scratch Quipu")?;
        if !bootstrap.status.success() {
            bail!(
                "Camayoc bootstrap failed against scratch Quipu {server} ({})\nstdout:\n{}\nstderr:\n{}",
                bootstrap.status,
                String::from_utf8_lossy(&bootstrap.stdout).trim(),
                String::from_utf8_lossy(&bootstrap.stderr).trim()
            );
        }
        if !scratch.path().join(".quipu/server.pid").exists() {
            bail!("Camayoc bootstrap did not start a scratch Quipu at {server}; refusing to verify against a server Tambo does not own");
        }
        let token = fs::read_to_string(home.join(".config/quipu/token"))
            .context("read scratch Camayoc credential")?;
        if token.trim().is_empty() {
            bail!("scratch Camayoc credential is empty");
        }
        let auth = tempfile::NamedTempFile::new_in(scratch.path())
            .context("create scratch Camayoc curl config")?;
        fs::write(auth.path(), curl_auth_header_line(token.trim())?)
            .context("write scratch Camayoc curl config")?;
        verify_camayoc_first_ingest(&root, &server, auth.path())
    }
}

/// Stops the scratch quipu-server Camayoc's bootstrap started, on every exit path.
struct ScratchServer(PathBuf);

impl Drop for ScratchServer {
    fn drop(&mut self) {
        if let Ok(pid) = fs::read_to_string(&self.0) {
            let pid = pid.trim();
            if !pid.is_empty() && pid.chars().all(|c| c.is_ascii_digit()) {
                let _ = Command::new("kill").arg(pid).status();
            }
        }
    }
}

fn free_local_port() -> Result<u16> {
    let listener =
        std::net::TcpListener::bind("127.0.0.1:0").context("reserve a free localhost port")?;
    Ok(listener.local_addr()?.port())
}

impl Adapter for Bobbin {
    fn name(&self) -> ToolName {
        ToolName::Bobbin
    }

    fn desired_version(&self) -> String {
        format!("bobbin {BOBBIN_VERSION}")
    }

    fn is_current(&self, installed: &str) -> bool {
        installed.strip_prefix("bobbin ").is_some_and(|rest| {
            rest == BOBBIN_VERSION || rest.starts_with(&format!("{BOBBIN_VERSION} "))
        })
    }

    fn install(&self) -> Result<()> {
        install_bobbin_release()
    }

    fn version(&self) -> Result<String> {
        read_version("bobbin")
    }

    fn verify(&self) -> Result<()> {
        let root = tempfile::tempdir().context("create bobbin verification repository")?;
        let nonce = SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .context("system clock predates Unix epoch")?
            .as_nanos();
        let repo = format!("tambo-verify-{}-{nonce}", std::process::id());
        let marker = format!("tambo_verify_marker_{}_{nonce}", std::process::id());
        checked("git", ["init", "--quiet"], Some(root.path()))?;
        checked("bobbin", ["init"], Some(root.path()))?;
        fs::write(
            root.path().join("control.rs"),
            "/// Proves the negative-control index is live.\npub fn tambo_control() -> usize {\n    1\n}\n",
        )
        .context("write bobbin negative-control fixture")?;
        checked(
            "bobbin",
            [
                "index",
                ".",
                "--source",
                ".",
                "--repo",
                &repo,
                "--skip-calibrate",
            ],
            Some(root.path()),
        )?;

        let before = checked(
            "bobbin",
            ["grep", &marker, "--repo", &repo, "--json"],
            Some(root.path()),
        )?;
        if bobbin_result_count(&before.stdout)? != 0 {
            bail!("bobbin negative control unexpectedly found the fixture marker");
        }

        fs::write(
            root.path().join("fixture.rs"),
            format!(
                "/// A unique Tambo verification routine.\npub fn {marker}() -> &'static str {{\n    \"indexed\"\n}}\n"
            ),
        )
        .context("write bobbin verification fixture")?;
        checked(
            "bobbin",
            [
                "index",
                ".",
                "--source",
                ".",
                "--repo",
                &repo,
                "--skip-calibrate",
            ],
            Some(root.path()),
        )?;
        let after = checked(
            "bobbin",
            ["grep", &marker, "--repo", &repo, "--json"],
            Some(root.path()),
        )?;
        if bobbin_result_count(&after.stdout)? == 0 {
            bail!("bobbin indexed the fixture but search did not return its marker");
        }
        Ok(())
    }
}

const YUPANA_VERSION: &str = "0.16.2";

impl Adapter for Yupana {
    fn name(&self) -> ToolName {
        ToolName::Yupana
    }

    fn desired_version(&self) -> String {
        format!("yupana {YUPANA_VERSION}")
    }

    fn install(&self) -> Result<()> {
        let (target, checksum) = yupana_release_for(env::consts::ARCH, env::consts::OS)?;
        let root = tempfile::tempdir().context("create Yupana download directory")?;
        fetch_yupana_release(target, checksum, root.path())?;
        let home = env::var_os("HOME").context("HOME is required to install Yupana")?;
        let bin = env::var_os("CARGO_HOME")
            .map(PathBuf::from)
            .unwrap_or_else(|| PathBuf::from(home).join(".cargo"))
            .join("bin");
        fs::create_dir_all(&bin).with_context(|| format!("create {}", bin.display()))?;
        fs::copy(root.path().join("yupana"), bin.join("yupana"))
            .context("install checksummed Yupana binary")?;
        Ok(())
    }

    fn version(&self) -> Result<String> {
        let version = read_version("yupana")?;
        require_minimum_version(&version, (0, 6, 4), "yupana")?;
        Ok(version)
    }

    fn verify(&self) -> Result<()> {
        let root = tempfile::tempdir().context("create Yupana verification repository")?;
        let state = root.path().join("state");
        fs::write(
            root.path().join("control.rs"),
            "pub fn tambo_yupana_control() -> usize { 1 }\n",
        )?;
        yupana_checked(root.path(), &state, ["analyze", "."])?;
        let before = yupana_checked(root.path(), &state, ["callers", "tambo_yupana_target", "."])?;
        if String::from_utf8_lossy(&before.stdout).contains("tambo_yupana_caller") {
            bail!("Yupana negative control unexpectedly found the fixture caller");
        }
        fs::write(
            root.path().join("fixture.rs"),
            "pub fn tambo_yupana_target() -> usize { 1 }\npub fn tambo_yupana_caller() -> usize { tambo_yupana_target() }\n",
        )?;
        yupana_checked(root.path(), &state, ["analyze", "."])?;
        let after = yupana_checked(root.path(), &state, ["callers", "tambo_yupana_target", "."])?;
        if !String::from_utf8_lossy(&after.stdout).contains("tambo_yupana_caller") {
            bail!("Yupana analyzed the fixture but callers did not return its caller");
        }
        Ok(())
    }
}

fn yupana_release_target() -> Result<&'static str> {
    yupana_release_for(env::consts::ARCH, env::consts::OS).map(|(target, _)| target)
}

// Digests of the published v0.12.7 archives, verified against SHA256SUMS.
fn yupana_release_for(arch: &str, os: &str) -> Result<(&'static str, &'static str)> {
    match (arch, os) {
        ("x86_64", "linux") => Ok((
            "x86_64-linux-gnu",
            "565507459d3d67b2cc73b6ebd91f784f0522689c5b62257a8fde82793580dc5d",
        )),
        ("aarch64", "macos") => Ok((
            "aarch64-apple-darwin",
            "9f3682c6f4dffd7365248ae2d686e9fcdca26ba08ebd915f8ce692e8111179a2",
        )),
        ("x86_64", "macos") => Ok((
            "x86_64-apple-darwin",
            "7763d171c7f6e2df395bdf9961a79991b66b4876c3394ce970d1f3e2cddcb4ed",
        )),
        _ => bail!("Yupana v{YUPANA_VERSION} has no checksummed Tambo release for {arch}-{os}"),
    }
}

fn fetch_yupana_release(target: &str, checksum: &str, root: &Path) -> Result<()> {
    let archive_name = format!("yupana-v{YUPANA_VERSION}-{target}.tar.gz");
    let archive = root.join(&archive_name);
    download_https(
        &format!(
            "https://github.com/scbrown/yupana/releases/download/v{YUPANA_VERSION}/{archive_name}"
        ),
        &archive,
    )?;
    verify_yupana_checksum(&archive, checksum)?;
    checked(
        "tar",
        [
            OsStr::new("-xzf"),
            archive.as_os_str(),
            OsStr::new("-C"),
            root.as_os_str(),
        ],
        None,
    )?;
    Ok(())
}

fn verify_yupana_checksum(archive: &Path, expected: &str) -> Result<()> {
    if manifest::sha256_file(archive)? != expected {
        bail!("Yupana release checksum mismatch");
    }
    Ok(())
}

fn yupana_checked<I, S>(cwd: &Path, state: &Path, args: I) -> Result<Output>
where
    I: IntoIterator<Item = S>,
    S: AsRef<OsStr>,
{
    let home = cwd.join("home");
    fs::create_dir_all(&home)?;
    let mut command = Command::new("yupana");
    command
        .args(args)
        .current_dir(cwd)
        .env("HOME", home)
        .env("XDG_STATE_HOME", state);
    let result = command
        .output()
        .context("run isolated Yupana verification")?;
    if !result.status.success() {
        bail!(
            "isolated Yupana verification failed ({}): {}",
            result.status,
            String::from_utf8_lossy(&result.stderr).trim()
        );
    }
    Ok(result)
}

// Review and install the executable the user's shell actually selects. CARGO_HOME
// must not silently override a different dp on PATH (aegis-fnp1wp).
fn desire_path_program() -> Result<PathBuf> {
    if let Some(path) = env::var_os("PATH") {
        for directory in env::split_paths(&path) {
            let candidate = directory.join("dp");
            if candidate.is_file() {
                #[cfg(unix)]
                {
                    use std::os::unix::fs::PermissionsExt;
                    if candidate.metadata()?.permissions().mode() & 0o111 == 0 {
                        continue;
                    }
                }
                return fs::canonicalize(candidate).context("resolve Desire Path executable");
            }
        }
    }
    let home = env::var_os("HOME").context("HOME is required to install Desire Path")?;
    Ok(PathBuf::from(home).join(".local/bin/dp"))
}

const DESIRE_PATH_REVISION: &str = "06812336fda6a6fd3fe4cbcae2d50a303e95a024";
const DESIRE_PATH_VERSION: &str = "v0.10.0";

impl Adapter for DesirePath {
    fn name(&self) -> ToolName {
        ToolName::DesirePath
    }

    fn desired_version(&self) -> String {
        format!("dp {DESIRE_PATH_VERSION} ({})", &DESIRE_PATH_REVISION[..7])
    }

    fn is_current(&self, installed: &str) -> bool {
        let expected = self.desired_version();
        installed.trim_start_matches("dp ").trim_start_matches('v')
            == expected.trim_start_matches("dp ").trim_start_matches('v')
    }

    fn install(&self) -> Result<()> {
        let executable = desire_path_program()?;
        let bin = executable
            .parent()
            .context("Desire Path needs an install directory")?;
        fs::create_dir_all(bin).with_context(|| format!("create {}", bin.display()))?;
        let ldflags = format!(
            "-X github.com/scbrown/desire-path/internal/cli.Version={DESIRE_PATH_VERSION} -X github.com/scbrown/desire-path/internal/cli.Commit={DESIRE_PATH_REVISION}"
        );
        let mut command = Command::new("go");
        command
            .args([
                "install",
                "-ldflags",
                &ldflags,
                &format!("github.com/scbrown/desire-path/cmd/dp@{DESIRE_PATH_REVISION}"),
            ])
            .env("GOBIN", bin);
        let result = command
            .output()
            .context("build pinned Desire Path revision")?;
        if !result.status.success() {
            bail!(
                "Desire Path install failed ({}): {}",
                result.status,
                String::from_utf8_lossy(&result.stderr).trim()
            );
        }
        Ok(())
    }

    fn version(&self) -> Result<String> {
        let result = checked(desire_path_program()?, ["version"], None)?;
        let version = String::from_utf8_lossy(&result.stdout).trim().to_owned();
        // Identity only, like every other adapter: `is_current` and package
        // `standing` judge it against the pin. Refusing here made a brew-owned
        // dp that is AHEAD of the pin unreadable, so the member failed (aegis-fv4).
        if version.is_empty() {
            bail!("dp version returned no version");
        }
        Ok(version)
    }

    fn verify(&self) -> Result<()> {
        let dp = desire_path_program()?;
        let root = tempfile::tempdir().context("create Desire Path verification directory")?;
        let db = root.path().join("desires.db");
        let marker = "tambo_desire_path_marker";
        let before = checked(
            &dp,
            [
                "--db",
                db.to_str().context("Desire Path DB path is not UTF-8")?,
                "--json",
                "list",
            ],
            Some(root.path()),
        )?;
        if String::from_utf8_lossy(&before.stdout).contains(marker) {
            bail!("Desire Path negative control unexpectedly found the marker");
        }
        let mut child = Command::new(&dp)
            .args([
                "--db",
                db.to_str().unwrap(),
                "ingest",
                "--source",
                "claude-code",
            ])
            .current_dir(root.path())
            .stdin(std::process::Stdio::piped())
            .stdout(std::process::Stdio::piped())
            .stderr(std::process::Stdio::piped())
            .spawn()
            .context("start Desire Path ingest verification")?;
        use std::io::Write as _;
        child
            .stdin
            .take()
            .context("open Desire Path verification stdin")?
            .write_all(
                format!(r#"{{"tool_name":"{marker}","error":"fixture failure"}}"#).as_bytes(),
            )?;
        let ingested = child.wait_with_output()?;
        if !ingested.status.success() {
            bail!(
                "Desire Path ingest verification failed ({}): {}",
                ingested.status,
                String::from_utf8_lossy(&ingested.stderr).trim()
            );
        }
        let after = checked(
            &dp,
            ["--db", db.to_str().unwrap(), "--json", "list"],
            Some(root.path()),
        )?;
        if !String::from_utf8_lossy(&after.stdout).contains(marker) {
            bail!("Desire Path ingested the fixture but its reader path did not return it");
        }
        Ok(())
    }
}

fn bobbin_result_count(stdout: &[u8]) -> Result<u64> {
    let response: serde_json::Value =
        serde_json::from_slice(stdout).context("parse bobbin search JSON")?;
    response["count"]
        .as_u64()
        .context("bobbin search JSON omitted numeric count")
}

fn bobbin_release_target() -> Result<&'static str> {
    match (env::consts::ARCH, env::consts::OS) {
        ("x86_64", "linux") => Ok("x86_64-unknown-linux-gnu"),
        ("aarch64", "linux") => Ok("aarch64-unknown-linux-gnu"),
        ("x86_64", "macos") => Ok("x86_64-apple-darwin"),
        ("aarch64", "macos") => Ok("aarch64-apple-darwin"),
        (arch, os) => bail!("bobbin has no Tambo release target for {arch}-{os}"),
    }
}

fn install_bobbin_release() -> Result<()> {
    let target = bobbin_release_target()?;
    let archive = format!("bobbin-v{BOBBIN_VERSION}-{target}.tar.gz");
    let base = format!("https://github.com/scbrown/bobbin/releases/download/v{BOBBIN_VERSION}");
    let download = tempfile::tempdir().context("create bobbin download directory")?;
    let archive_path = download.path().join(&archive);
    let sums_path = download.path().join("SHA256SUMS.txt");
    download_https(&format!("{base}/{archive}"), &archive_path)?;
    download_https(&format!("{base}/SHA256SUMS.txt"), &sums_path)?;
    verify_checksum(&archive_path, &sums_path)?;

    let home = env::var_os("HOME").context("HOME is required to install bobbin")?;
    let install_root = PathBuf::from(&home)
        .join(".local/share/caboodle/bobbin")
        .join(format!("v{BOBBIN_VERSION}"));
    fs::create_dir_all(&install_root)
        .with_context(|| format!("create bobbin install root {}", install_root.display()))?;
    checked(
        "tar",
        [
            OsStr::new("-xzf"),
            archive_path.as_os_str(),
            OsStr::new("--strip-components=1"),
            OsStr::new("-C"),
            install_root.as_os_str(),
        ],
        None,
    )?;

    let bin_dir = env::var_os("CARGO_HOME")
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from(home).join(".cargo"))
        .join("bin");
    fs::create_dir_all(&bin_dir)
        .with_context(|| format!("create binary directory {}", bin_dir.display()))?;
    let link = bin_dir.join("bobbin");
    let target = install_root.join("bobbin");
    ensure_bobbin_link(&link, &target)?;
    Ok(())
}

fn ensure_bobbin_link(link: &Path, target: &Path) -> Result<()> {
    if !target.is_file() {
        bail!("Bobbin release archive omitted {}", target.display());
    }
    match link.symlink_metadata() {
        Ok(metadata)
            if metadata.file_type().is_symlink()
                && fs::read_link(link).ok().as_deref() == Some(target) =>
        {
            return Ok(());
        }
        // A DANGLING symlink is Tambo's own debris, not a user's install, and
        // refusing to repair it deadlocks the tool against itself.
        //
        // Measured on Tambo CI, red on main 2026-08-31 -> 2026-09-02, one job,
        // every run:
        //
        //     bobbin: not installed (run bobbin --version:
        //             No such file or directory (os error 2)); installing
        //     Error: bobbin install step
        //     Caused by: refusing to replace existing
        //                /home/runner/.cargo/bin/bobbin; remove or repair it explicitly
        //
        // Those two lines are the SAME fact seen from two sides. Executing a
        // symlink whose target is gone fails with ENOENT, which is exactly why the
        // probe a moment earlier concluded bobbin was not installed — so the
        // installer refuses to repair the very condition that summoned it. The
        // state is then permanent: never detected as present, never allowed to be
        // written. Nothing a re-run can do changes it.
        //
        // The refusal is right for anything a person could still be using — a real
        // binary, a directory, a symlink that resolves. A dangling link is none of
        // those: following it is an error for every reader, so there is no working
        // installation here to protect.
        Ok(metadata) if metadata.file_type().is_symlink() && !link.exists() => {
            fs::remove_file(link).with_context(|| format!("remove dangling {}", link.display()))?;
        }
        Ok(_) => {
            bail!(
                "refusing to replace existing {}; preserve it at a new backup path such as {}.before-tambo, then rerun apply; see Installing > Replacing a cargo-installed Bobbin for backup and rollback commands",
                link.display(),
                link.display()
            );
        }
        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
        Err(error) => return Err(error).with_context(|| format!("inspect {}", link.display())),
    }
    #[cfg(unix)]
    std::os::unix::fs::symlink(target, link)
        .with_context(|| format!("link bobbin into {}", link.display()))?;
    #[cfg(not(unix))]
    bail!("bobbin release installation currently requires a Unix host");
    Ok(())
}

// Official v0.1.6 source release; keep revision, release asset and digest paired.
const CAMAYOC_REVISION: &str = "724b0a8dc191167da968285c677a8868a44e16a3";
const CAMAYOC_ARCHIVE_SHA256: &str =
    "59128dc3e23a5631caad18066e4b1610983d00c7733498198b69f5c2be484909";

pub(crate) fn camayoc_root() -> Result<PathBuf> {
    if let Some(path) = env::var_os("CABOODLE_CAMAYOC_ROOT") {
        return Ok(PathBuf::from(path));
    }
    let home = env::var_os("HOME").context("HOME is required to install Camayoc")?;
    Ok(PathBuf::from(home)
        .join(".local/share/caboodle/camayoc")
        .join(CAMAYOC_REVISION))
}

fn install_camayoc_bundle() -> Result<()> {
    let root = camayoc_root()?;
    if root.join("REVISION").exists() {
        return Ok(());
    }
    let download = tempfile::tempdir().context("create Camayoc download directory")?;
    let archive = download.path().join("camayoc.tar.gz");
    download_https(
        "https://github.com/intigraph/camayoc/releases/download/v0.1.6/camayoc-v0.1.6.tar.gz",
        &archive,
    )?;
    if crate::embedding::sha256_file(&archive)? != CAMAYOC_ARCHIVE_SHA256 {
        bail!("Camayoc archive checksum mismatch");
    }
    fs::create_dir_all(&root)
        .with_context(|| format!("create Camayoc install root {}", root.display()))?;
    checked(
        "tar",
        [
            OsStr::new("-xzf"),
            archive.as_os_str(),
            OsStr::new("--strip-components=1"),
            OsStr::new("-C"),
            root.as_os_str(),
        ],
        None,
    )?;
    fs::write(root.join("REVISION"), format!("{CAMAYOC_REVISION}\n"))
        .context("write installed Camayoc revision")?;
    Ok(())
}

fn verify_camayoc_first_ingest(root: &Path, server: &str, auth: &Path) -> Result<()> {
    let namespace = camayoc_aegis_namespace(&root.join("ontology/core.ttl"))?;
    let control = "tambo-camayoc-control-must-stay-absent";
    let marker = "tambo-camayoc-first-ingest-v1";

    if label_count(server, &namespace, control, auth)? != 0 {
        bail!("Camayoc negative control unexpectedly exists");
    }

    let turtle = format!(
        "@prefix aegis: <{namespace}> .\n@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .\n\
         aegis:{marker} a aegis:Verification ; rdfs:label \"{marker}\" ; \
         aegis:sourceKind \"observed\" ; aegis:falsifier \"the marker remains absent after ingest\" .\n"
    );
    let payload = json!({
        "turtle": turtle,
        "actor": "caboodle",
        "source": "Tambo Camayoc first-ingest verification"
    });
    if label_count(server, &namespace, marker, auth)? == 0 {
        let first = curl_json_request_with_config(
            &format!("{server}/knot"),
            Some(payload.to_string()),
            Some(auth),
        )?;
        if first.get("count").and_then(Value::as_u64).unwrap_or(0) == 0 {
            bail!("Camayoc first ingest wrote no triples");
        }
    }
    if label_count(server, &namespace, marker, auth)? == 0 {
        bail!("Camayoc first ingest was not retrievable");
    }
    curl_json_request_with_config(
        &format!("{server}/knot"),
        Some(payload.to_string()),
        Some(auth),
    )?;
    if label_count(server, &namespace, marker, auth)? != 1 {
        bail!("Camayoc idempotent replay wrote duplicate triples");
    }
    Ok(())
}

pub(crate) fn camayoc_aegis_namespace(path: &Path) -> Result<String> {
    let body = fs::read_to_string(path)
        .with_context(|| format!("read Camayoc ontology {}", path.display()))?;
    body.lines()
        .find_map(|line| {
            line.trim()
                .strip_prefix("@prefix aegis: <")
                .and_then(|rest| rest.strip_suffix("> ."))
                .map(str::to_owned)
        })
        .context("Camayoc ontology does not declare the aegis namespace")
}

fn label_count(server: &str, namespace: &str, label: &str, auth: &Path) -> Result<u64> {
    let query = format!(
        "SELECT ?s WHERE {{ ?s <http://www.w3.org/2000/01/rdf-schema#label> \"{label}\" . FILTER(STRSTARTS(STR(?s), \"{namespace}\")) }}"
    );
    let response = curl_json_request_with_config(
        &format!("{server}/query"),
        Some(json!({"query": query}).to_string()),
        Some(auth),
    )?;
    response["count"]
        .as_u64()
        .context("Quipu query response omitted numeric count")
}

pub(crate) fn curl_json(url: &str, payload: &Value) -> Result<Value> {
    curl_json_request(url, Some(payload.to_string()))
}

fn curl_get_json(url: &str) -> Result<Value> {
    curl_json_request(url, None)
}

/// The curl config line carrying `QUIPU_AUTH_TOKEN`, in a temp file so the token
/// never reaches argv. curl parses a quoted config value with backslash
/// escapes, so `\` and `"` are escaped; a newline would end the line and let
/// the token inject a second directive, so it is refused rather than escaped.
fn quipu_auth_config() -> Result<Option<tempfile::NamedTempFile>> {
    crate::quipu_auth::config()
}

pub(crate) fn curl_auth_header_line(token: &str) -> Result<String> {
    if token.contains(['\n', '\r']) {
        bail!("QUIPU_AUTH_TOKEN contains a line break; refusing to pass it to curl");
    }
    let escaped = token.replace('\\', "\\\\").replace('"', "\\\"");
    Ok(format!("header = \"Authorization: Bearer {escaped}\"\n"))
}

/// POST an empty body to `/episode` with the caller's token and return the HTTP
/// status and body. Quipu checks the bearer before it parses the episode, so an
/// accepted token yields a validation error (400) and NOTHING is written, while a
/// missing or rejected token yields 401. That makes it an authenticated no-op:
/// the only way to prove the write path without writing (aegis-0c1qdi). The
/// token travels in a curl config file, never on the command line.
pub(crate) fn quipu_write_probe(server: &str) -> Result<(u16, String, bool)> {
    let body_file = tempfile::NamedTempFile::new().context("create write-probe body file")?;
    let auth = quipu_auth_config()?;
    let mut args: Vec<OsString> = [
        "--silent",
        "--max-time",
        "5",
        "--request",
        "POST",
        "--header",
        "Content-Type: application/json",
        "--data",
        "{}",
        "--write-out",
        "%{http_code}",
        "--output",
    ]
    .iter()
    .map(OsString::from)
    .collect();
    args.push(body_file.path().as_os_str().to_owned());
    if let Some(file) = &auth {
        args.push(OsString::from("--config"));
        args.push(file.path().as_os_str().to_owned());
    }
    args.push(OsString::from(format!(
        "{}/episode",
        server.trim_end_matches('/')
    )));
    let result = output("curl", args, None)?;
    let code = String::from_utf8_lossy(&result.stdout)
        .trim()
        .parse::<u16>()
        .unwrap_or(0);
    let body = fs::read_to_string(body_file.path()).unwrap_or_default();
    Ok((code, body, auth.is_some()))
}

fn curl_json_request(url: &str, body: Option<String>) -> Result<Value> {
    let auth = quipu_auth_config()?;
    curl_json_request_with_config(url, body, auth.as_ref().map(|file| file.path()))
}

fn curl_json_request_with_config(
    url: &str,
    body: Option<String>,
    auth: Option<&Path>,
) -> Result<Value> {
    let mut args = vec![
        OsString::from("--fail"),
        OsString::from("--silent"),
        OsString::from("--show-error"),
    ];
    if let Some(body) = body {
        args.extend([
            OsString::from("--request"),
            OsString::from("POST"),
            OsString::from("--header"),
            OsString::from("Content-Type: application/json"),
            OsString::from("--data"),
            OsString::from(body),
        ]);
    }
    if let Some(file) = &auth {
        args.push(OsString::from("--config"));
        args.push(file.as_os_str().to_owned());
    }
    args.push(OsString::from(url));
    let result = checked("curl", args, None)?;
    serde_json::from_slice(&result.stdout)
        .with_context(|| format!("parse JSON response from {url}"))
}

pub(crate) fn download_https(url: &str, destination: &Path) -> Result<()> {
    // Retry only the GET, never its checksum or installation step. A blanket
    // curl --retry-all-errors would also retry a missing asset or bad local path.
    const ATTEMPTS: u32 = 3;
    for attempt in 1..=ATTEMPTS {
        // A failed/partial response must not become the next attempt's input,
        // or replace a previously downloaded artifact when retries run out.
        let pending = tempfile::NamedTempFile::new_in(
            destination
                .parent()
                .filter(|p| !p.as_os_str().is_empty())
                .unwrap_or(Path::new(".")),
        )
        .context("create pending download")?;
        let result = output(
            "curl",
            [
                OsStr::new("--disable"),
                OsStr::new("--fail"),
                OsStr::new("--location"),
                OsStr::new("--silent"),
                OsStr::new("--show-error"),
                OsStr::new("--proto"),
                OsStr::new("=https"),
                OsStr::new("--tlsv1.2"),
                OsStr::new("--connect-timeout"),
                OsStr::new("10"),
                OsStr::new("--max-time"),
                OsStr::new("120"),
                OsStr::new("--write-out"),
                OsStr::new("%{http_code}"),
                OsStr::new("--output"),
                pending.path().as_os_str(),
                OsStr::new(url),
            ],
            None,
        )?;
        if result.status.success() {
            pending
                .persist(destination)
                .context("publish downloaded artifact")?;
            if attempt > 1 {
                eprintln!("download {url}: succeeded on attempt {attempt}/{ATTEMPTS}");
            }
            return Ok(());
        }
        let http = String::from_utf8_lossy(&result.stdout)
            .trim()
            .parse::<u16>()
            .unwrap_or(0);
        let detail = format!(
            "download {url}: attempt {attempt}/{ATTEMPTS}, curl {}, HTTP {http:03}: {}",
            result.status,
            String::from_utf8_lossy(&result.stderr).trim()
        );
        if !retryable_download(result.status.code(), http) {
            bail!("{detail}; terminal failure (not retried)");
        }
        if attempt == ATTEMPTS {
            bail!("{detail}; retry limit exhausted");
        }
        let delay = 1 << (attempt - 1);
        eprintln!("{detail}; retrying in {delay}s");
        drop(pending);
        std::thread::sleep(std::time::Duration::from_secs(delay));
    }
    unreachable!("every final attempt returns")
}

fn retryable_download(code: Option<i32>, http: u16) -> bool {
    // An observed client error wins even when reading its body timed out.
    if (400..500).contains(&http) {
        return false;
    }
    match code {
        Some(22) => (500..600).contains(&http),
        // curl transport errors: proxy/DNS resolution, connect, partial body,
        // timeout, empty reply, send/receive and HTTP/2 stream failures.
        Some(5 | 6 | 7 | 18 | 28 | 52 | 55 | 56 | 92) => true,
        // Certificate, local I/O, invocation and unknown errors stay fatal.
        _ => false,
    }
}

fn verify_checksum(archive: &Path, sums: &Path) -> Result<()> {
    let filename = archive
        .file_name()
        .and_then(OsStr::to_str)
        .context("bobbin archive filename is not UTF-8")?;
    let expected = fs::read_to_string(sums)
        .context("read Bobbin checksum manifest")?
        .lines()
        .find_map(|line| {
            let mut fields = line.split_whitespace();
            let digest = fields.next()?;
            let listed = fields.next()?.trim_start_matches('*');
            (listed == filename).then(|| digest.to_owned())
        })
        .with_context(|| format!("checksum manifest does not cover {filename}"))?;
    if crate::embedding::sha256_file(archive)? != expected {
        bail!("checksum mismatch for {filename}");
    }
    Ok(())
}

#[cfg(test)]
mod yupana_release_tests {
    use super::*;

    #[test]
    fn published_platforms_resolve_and_missing_platforms_refuse() {
        for (arch, os, target) in [
            ("x86_64", "linux", "x86_64-linux-gnu"),
            ("aarch64", "macos", "aarch64-apple-darwin"),
            ("x86_64", "macos", "x86_64-apple-darwin"),
        ] {
            assert_eq!(yupana_release_for(arch, os).unwrap().0, target);
        }
        assert!(yupana_release_for("aarch64", "linux").is_err());
        assert!(yupana_release_for("x86_64", "windows").is_err());
        assert!(!prerequisites(ToolName::Yupana, QuipuFlavor::Release).contains(&"sha256sum"));
    }

    #[test]
    fn checksum_refuses_corruption_without_an_external_hash_command() {
        let root = tempfile::tempdir().unwrap();
        let file = root.path().join("archive");
        fs::write(&file, b"abc").unwrap();
        let expected = "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad";
        verify_yupana_checksum(&file, expected).unwrap();
        fs::write(&file, b"abd").unwrap();
        assert!(verify_yupana_checksum(&file, expected).is_err());
    }

    // aegis-em2.2: on the Mac the consumer LaunchAgent's PATH has no /sbin,
    // where macOS keeps sha256sum, so every Camayoc install failed there.
    #[test]
    fn camayoc_needs_no_external_hash_command() {
        for flavor in [QuipuFlavor::Release, QuipuFlavor::Lancedb] {
            assert!(!prerequisites(ToolName::Camayoc, flavor).contains(&"sha256sum"));
        }
    }

    /// Runs in a child copy of this test binary whose PATH is EMPTY, so no
    /// external hash command can be found; env mutation in-process would race
    /// the other tests (aegis-em2.2).
    #[test]
    fn checksums_verify_and_refuse_with_an_empty_path() {
        const CHILD: &str = "TAMBO_EMPTY_PATH_CHECKSUM_CHILD";
        if env::var_os(CHILD).is_some() {
            assert_eq!(env::var_os("PATH").as_deref(), Some(OsStr::new("")));
            let root = tempfile::tempdir().unwrap();
            let archive = root.path().join("bobbin.tar.gz");
            let sums = root.path().join("SHA256SUMS");
            let abc = "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad";
            fs::write(&archive, b"abc").unwrap();
            fs::write(&sums, format!("{abc}  bobbin.tar.gz\n")).unwrap();
            verify_checksum(&archive, &sums).unwrap();
            verify_yupana_checksum(&archive, abc).unwrap();
            fs::write(&archive, b"abd").unwrap();
            let mismatch = verify_checksum(&archive, &sums).unwrap_err();
            assert!(
                format!("{mismatch:#}").contains("checksum mismatch"),
                "{mismatch:#}"
            );
            assert!(verify_yupana_checksum(&archive, abc).is_err());
            return;
        }
        let output = Command::new(env::current_exe().unwrap())
            .args([
                "--exact",
                "adapter::yupana_release_tests::checksums_verify_and_refuse_with_an_empty_path",
                "--nocapture",
                "--test-threads=1",
            ])
            .env("PATH", "")
            .env(CHILD, "1")
            .output()
            .unwrap();
        let stdout = String::from_utf8_lossy(&output.stdout);
        assert!(
            output.status.success() && stdout.contains("1 passed"),
            "empty-PATH child failed:\n{stdout}\n{}",
            String::from_utf8_lossy(&output.stderr)
        );
    }

    #[test]
    fn manifest_checksum_is_computed_in_process() {
        let root = tempfile::tempdir().unwrap();
        let archive = root.path().join("bobbin.tar.gz");
        let sums = root.path().join("SHA256SUMS");
        fs::write(&archive, b"abc").unwrap();
        fs::write(
            &sums,
            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad  bobbin.tar.gz\n",
        )
        .unwrap();
        verify_checksum(&archive, &sums).unwrap();
        fs::write(&archive, b"abd").unwrap();
        assert!(verify_checksum(&archive, &sums).is_err());
    }

    #[test]
    #[ignore = "downloads all three published archives; explicit release acceptance"]
    fn real_yupana_archives_match_pins_and_unpack() {
        for (arch, os) in [
            ("x86_64", "linux"),
            ("aarch64", "macos"),
            ("x86_64", "macos"),
        ] {
            let (target, checksum) = yupana_release_for(arch, os).unwrap();
            let root = tempfile::tempdir().unwrap();
            fetch_yupana_release(target, checksum, root.path()).unwrap();
            assert!(root.path().join("yupana").is_file());
            assert_eq!(
                fs::read_link(root.path().join("hank")).unwrap(),
                Path::new("yupana")
            );
            eprintln!("verified published {target}: {checksum}");
        }
    }
}

#[cfg(test)]
mod flavor_tests {
    use super::{
        fetch_quipu_release, quipu_install_args, quipu_release_target, quipu_release_target_for,
        require_compiled_feature,
    };
    use crate::model::QuipuFlavor;
    use serde_json::json;

    #[test]
    fn install_args_add_only_the_lancedb_feature_to_the_reviewed_pin() {
        let release = quipu_install_args(QuipuFlavor::Release);
        let lancedb = quipu_install_args(QuipuFlavor::Lancedb);
        assert_eq!(release[6], "full");
        assert_eq!(lancedb[6], "full,lancedb");
        // Everything but the feature list must be identical, so the lancedb
        // flavor stays pinned to the same reviewed revision.
        assert_eq!(release[..6], lancedb[..6]);
        assert_eq!(release[7..], lancedb[7..]);
        assert!(release.contains(&"--locked"));
    }

    #[test]
    fn default_quipu_release_has_a_supported_host_artifact() {
        if (std::env::consts::ARCH, std::env::consts::OS) == ("x86_64", "linux") {
            assert_eq!(quipu_release_target().unwrap(), "x86_64-unknown-linux-gnu");
        }
    }

    #[test]
    fn quipu_release_supports_published_linux_and_macos_architectures() {
        for (arch, os, target) in [
            ("x86_64", "linux", "x86_64-unknown-linux-gnu"),
            ("aarch64", "linux", "aarch64-unknown-linux-gnu"),
            ("x86_64", "macos", "x86_64-apple-darwin"),
            ("aarch64", "macos", "aarch64-apple-darwin"),
        ] {
            assert_eq!(quipu_release_target_for(arch, os).unwrap(), target);
        }
        assert!(quipu_release_target_for("x86_64", "windows").is_err());
    }

    #[test]
    #[ignore = "downloads published artifacts; explicit release acceptance only"]
    fn real_aarch64_quipu_release_resolves_and_verifies() {
        for os in ["macos", "linux"] {
            let target = quipu_release_target_for("aarch64", os).unwrap();
            let download = tempfile::tempdir().unwrap();
            let unpacked = fetch_quipu_release(target, download.path()).unwrap();
            assert!(unpacked.join("quipu").is_file());
            assert!(unpacked.join("quipu-server").is_file());
            eprintln!("verified published Quipu checksums and both binaries for {target}");
        }
    }

    #[test]
    fn compile_map_proof_requires_a_true_lancedb_entry() {
        require_compiled_feature(&json!({"features": {"lancedb": true}}), "lancedb").unwrap();

        let absent = require_compiled_feature(&json!({"features": {"onnx": true}}), "lancedb")
            .unwrap_err()
            .to_string();
        assert!(absent.contains("compiled without it"), "{absent}");

        let disabled =
            require_compiled_feature(&json!({"features": {"lancedb": false}}), "lancedb")
                .unwrap_err()
                .to_string();
        assert!(disabled.contains("compiled without it"), "{disabled}");

        // A server too old to report the map proves nothing; that is a
        // refusal, not a pass.
        let unmapped = require_compiled_feature(&json!({"version": "0.3.27"}), "lancedb")
            .unwrap_err()
            .to_string();
        assert!(
            unmapped.contains("no per-feature compile map"),
            "{unmapped}"
        );
    }
}

#[cfg(all(test, unix))]
mod tests {
    use super::ensure_bobbin_link;
    use std::{fs, os::unix::fs::symlink};

    #[test]
    fn failed_commands_preserve_both_diagnostic_streams_and_status() {
        for script in [
            "printf 'bootstrap rejected'; exit 2",
            "printf 'bootstrap rejected' >&2; exit 2",
            "printf 'probe started'; printf 'bootstrap rejected' >&2; exit 2",
            "exit 2",
        ] {
            let error = super::checked("sh", ["-c", script], None)
                .unwrap_err()
                .to_string();
            assert!(error.contains("exit status: 2"), "{error}");
            assert!(error.contains("stdout:\n"), "{error}");
            assert!(error.contains("stderr:\n"), "{error}");
            if script.contains("bootstrap rejected") {
                assert!(error.contains("bootstrap rejected"), "{error}");
            }
            if script.contains("probe started") {
                assert!(error.contains("probe started"), "{error}");
            }
        }
        let output = super::checked("sh", ["-c", "printf 'successful output'"], None).unwrap();
        assert_eq!(output.stdout, b"successful output");
    }

    #[test]
    fn bobbin_link_accepts_its_restored_cache_entry_but_refuses_foreign_paths() {
        let root = tempfile::tempdir().unwrap();
        let target = root.path().join("release/bobbin");
        fs::create_dir_all(target.parent().unwrap()).unwrap();
        fs::write(&target, "binary fixture").unwrap();

        let link = root.path().join("bin/bobbin");
        fs::create_dir_all(link.parent().unwrap()).unwrap();
        symlink(&target, &link).unwrap();
        ensure_bobbin_link(&link, &target).unwrap();
        assert_eq!(fs::read_link(&link).unwrap(), target);

        let foreign = root.path().join("foreign");
        fs::write(&foreign, "do not replace").unwrap();
        fs::remove_file(&link).unwrap();
        symlink(&foreign, &link).unwrap();
        let error = ensure_bobbin_link(&link, &target).unwrap_err().to_string();
        assert!(error.contains("refusing to replace existing"));
        assert_eq!(fs::read_link(&link).unwrap(), foreign);
    }

    #[test]
    fn bobbin_link_repairs_its_own_dangling_link_but_still_refuses_a_real_file() {
        // The CI deadlock, both arms. A dangling link makes `bobbin --version`
        // fail with ENOENT, so the probe reports "not installed" and calls the
        // installer -- which then refused to touch it. Never present, never
        // writable, and no re-run could break the tie.
        let root = tempfile::tempdir().unwrap();
        let target = root.path().join("release/bobbin");
        fs::create_dir_all(target.parent().unwrap()).unwrap();
        fs::write(&target, "binary fixture").unwrap();
        let link = root.path().join("bin/bobbin");
        fs::create_dir_all(link.parent().unwrap()).unwrap();

        symlink(root.path().join("gone/bobbin"), &link).unwrap();
        assert!(link.symlink_metadata().is_ok(), "the link itself exists");
        assert!(
            !link.exists(),
            "but it resolves to nothing -- this is the ENOENT"
        );
        ensure_bobbin_link(&link, &target).unwrap();
        assert_eq!(fs::read_link(&link).unwrap(), target);

        // and the repair must not have widened into "replace whatever is there":
        // a REGULAR FILE is somebody's binary and is still refused.
        fs::remove_file(&link).unwrap();
        fs::write(&link, "a real bobbin somebody installed").unwrap();
        let error = ensure_bobbin_link(&link, &target).unwrap_err().to_string();
        assert!(error.contains("refusing to replace existing"));
        assert_eq!(
            fs::read_to_string(&link).unwrap(),
            "a real bobbin somebody installed"
        );
    }
}

#[cfg(test)]
mod auth_config_tests {
    use super::curl_auth_header_line;

    #[test]
    fn curl_auth_line_escapes_quotes_and_refuses_line_breaks() {
        assert_eq!(
            curl_auth_header_line("abc").unwrap(),
            "header = \"Authorization: Bearer abc\"\n"
        );
        assert_eq!(
            curl_auth_header_line(r#"a"b\c"#).unwrap(),
            "header = \"Authorization: Bearer a\\\"b\\\\c\"\n"
        );
        // A newline would end the config line and let the token add a directive.
        assert!(curl_auth_header_line("tok\nurl = \"http://elsewhere\"").is_err());
        assert!(curl_auth_header_line("tok\r").is_err());
    }
}

/// Verify one embedded release member without installing it.
pub fn verify_member(name: &str) -> Result<()> {
    let member = crate::members::get(name).context("unknown reviewed member")?;
    manifest::verify_release_member(member)
}

#[cfg(all(test, unix))]
mod quipu_alias_layout_tests {
    use super::verify_quipu_alias;
    use std::os::unix::fs::symlink;
    use std::{fs, path::Path};

    fn script(path: &Path, version: &str) {
        crate::test_exec::write_executable(path, &format!("#!/bin/sh\necho '{version}'\n"));
    }

    #[test]
    fn package_managed_layout_passes_with_qp_beside_the_resolved_quipu() {
        // Homebrew: bin/quipu and bin/qp link into the Cellar, where the
        // formula owns the relative qp -> quipu.
        let root = tempfile::tempdir().unwrap();
        let cellar = root.path().join("Cellar/quipu/1.0/bin");
        let bin = root.path().join("bin");
        fs::create_dir_all(&cellar).unwrap();
        fs::create_dir(&bin).unwrap();
        script(&cellar.join("quipu"), "quipu 1.0");
        symlink("quipu", cellar.join("qp")).unwrap();
        symlink("../Cellar/quipu/1.0/bin/quipu", bin.join("quipu")).unwrap();
        symlink("../Cellar/quipu/1.0/bin/qp", bin.join("qp")).unwrap();
        verify_quipu_alias(&bin.join("quipu")).unwrap();
    }

    #[test]
    fn a_qp_for_another_program_or_no_qp_still_fails() {
        let root = tempfile::tempdir().unwrap();
        let bin = root.path().join("bin");
        fs::create_dir(&bin).unwrap();
        script(&bin.join("quipu"), "quipu 1.0");
        let err = verify_quipu_alias(&bin.join("quipu")).unwrap_err();
        assert!(err.to_string().contains("requires relative qp -> quipu"));
        // A relative link exists beside the resolved file, but the qp on PATH
        // is a different program: refuse.
        let cellar = root.path().join("Cellar/bin");
        fs::create_dir_all(&cellar).unwrap();
        script(&cellar.join("quipu"), "quipu 1.0");
        symlink("quipu", cellar.join("qp")).unwrap();
        script(&root.path().join("other"), "quipu 1.0");
        let pkg = root.path().join("pkgbin");
        fs::create_dir(&pkg).unwrap();
        symlink("../Cellar/bin/quipu", pkg.join("quipu")).unwrap();
        symlink("../other", pkg.join("qp")).unwrap();
        let err = verify_quipu_alias(&pkg.join("quipu")).unwrap_err();
        assert!(err.to_string().contains("same executable"));
    }

    #[test]
    fn owned_layout_with_qp_beside_quipu_still_passes() {
        let root = tempfile::tempdir().unwrap();
        script(&root.path().join("quipu"), "quipu 1.0");
        symlink("quipu", root.path().join("qp")).unwrap();
        verify_quipu_alias(&root.path().join("quipu")).unwrap();
    }
}