vissue-mcp 0.7.0

Model Context Protocol server exposing vissue issue tracking to agents
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//! The MCP tool surface, calling vissue-core in process.

use rmcp::{
    ErrorData as McpError, handler::server::ServerHandler, handler::server::wrapper::Parameters,
    model::*, tool, tool_handler, tool_router,
};

use vissue_core::config::Layout;
use vissue_core::mirror::{self, Format};
use vissue_core::ops::{self, CreateOpts, RejectOpts, UpdatePred};
use vissue_core::router::Router;
use vissue_core::{agent, events, report};

use crate::tools::*;

/// The tool router is built by `#[tool_handler]` through `Self::tool_router()`,
/// so the server carries the default layout and the user-level project router.
#[derive(Clone)]
pub struct VissueServer {
    layout: Layout,
    router: Router,
}

/// Where a `reject` should put its successor.
struct RejectDest {
    layout: Layout,
    project: Option<String>,
    extra_ids: Vec<String>,
}

fn text<E: std::fmt::Display>(result: Result<String, E>) -> Result<CallToolResult, McpError> {
    match result {
        Ok(s) => Ok(CallToolResult::success(vec![Content::text(s)])),
        Err(e) => Err(McpError::internal_error(format!("{e}"), None)),
    }
}

fn json<E: std::fmt::Display>(
    result: Result<serde_json::Value, E>,
) -> Result<CallToolResult, McpError> {
    match result {
        Ok(v) => {
            let rendered = serde_json::to_string_pretty(&v).unwrap_or_else(|_| "null".to_string());
            Ok(CallToolResult::success(vec![Content::text(rendered)]))
        }
        Err(e) => Err(McpError::internal_error(format!("{e}"), None)),
    }
}

#[tool_router]
impl VissueServer {
    /// Resolve the layout from `VISSUE_ROOT` and `VISSUE_PREFIX`, or the
    /// current directory, then load the user-level route table.
    pub fn from_env() -> anyhow::Result<Self> {
        let layout = Layout::resolve(None, None)?;
        let router = Router::load(layout.clone())?;
        Ok(Self { layout, router })
    }

    #[cfg(test)]
    pub fn with_layout(layout: Layout) -> Self {
        Self {
            router: Router::unrouted(layout.clone()),
            layout,
        }
    }

    fn layout_for_id(&self, id: &str) -> vissue_core::Result<Layout> {
        Ok(self.router.find_by_id(id)?.layout)
    }

    /// `to` names an existing heading, so its own layout wins. Otherwise the
    /// create project is routed, which keeps a bounce onto a routed name off
    /// the server's own root.
    fn reject_destination(
        &self,
        src: &Layout,
        to: Option<&str>,
        project: Option<&str>,
    ) -> vissue_core::Result<RejectDest> {
        if let Some(to) = to {
            return Ok(RejectDest {
                layout: self.layout_for_id(to)?,
                project: project.map(str::to_string),
                extra_ids: Vec::new(),
            });
        }
        let Some(project) = project else {
            return Ok(RejectDest {
                layout: src.clone(),
                project: None,
                extra_ids: Vec::new(),
            });
        };
        let pref = self.router.route(project);
        let extra_ids = self.router.extra_ids_for(&pref.dir)?;
        Ok(RejectDest {
            layout: pref.layout,
            project: Some(pref.dir),
            extra_ids,
        })
    }

    #[tool(description = "List the projects that hold an issues.org under the tracker root.")]
    async fn vissue_projects(&self) -> Result<CallToolResult, McpError> {
        text(self.router.visible_projects().map(|ps| {
            format!(
                "{}\n",
                ps.into_iter().map(|p| p.key).collect::<Vec<_>>().join("\n")
            )
        }))
    }

    #[tool(description = "List issues, optionally filtered by project and state.")]
    async fn vissue_list(
        &self,
        Parameters(args): Parameters<ListArgs>,
    ) -> Result<CallToolResult, McpError> {
        json(issues_json_routed(
            &self.router,
            args.project.as_deref(),
            args.state.as_deref(),
            false,
        ))
    }

    #[tool(description = "List actionable issues: TODO or STARTED with no open blocker.")]
    async fn vissue_ready(
        &self,
        Parameters(args): Parameters<ProjectArgs>,
    ) -> Result<CallToolResult, McpError> {
        json(issues_json_routed(
            &self.router,
            args.project.as_deref(),
            None,
            true,
        ))
    }

    #[tool(description = "Show one issue's metadata and file range. Never returns body prose.")]
    async fn vissue_show(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        json(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| agent::show_json(&layout, &args.issue_id)),
        )
    }

    #[tool(description = "Create an issue in a project's issues.org.")]
    async fn vissue_create(
        &self,
        Parameters(args): Parameters<CreateArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(create_routed(
            &self.router,
            &args.project,
            &args.title,
            CreateOpts {
                priority: priority_char(args.priority.as_ref()),
                issue_type: args.issue_type.as_deref(),
                tags: args.tags.as_deref(),
                parent: args.parent.as_deref(),
                body: args.body.as_deref(),
                ..Default::default()
            },
        ))
    }

    #[tool(
        description = "Reject an issue by redirecting it to an existing destination (`to`) or a newly created replacement (`project` + `title`)."
    )]
    async fn vissue_reject(
        &self,
        Parameters(args): Parameters<RejectArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(self.layout_for_id(&args.issue_id).and_then(|layout| {
            let dest =
                self.reject_destination(&layout, args.to.as_deref(), args.project.as_deref())?;
            ops::reject(
                &layout,
                &args.issue_id,
                RejectOpts {
                    to: args.to.as_deref(),
                    project: dest.project.as_deref(),
                    title: args.title.as_deref(),
                    reason: args.reason.as_deref(),
                    dst_layout: Some(&dest.layout),
                    dst_extra_ids: &dest.extra_ids,
                },
            )
        }))
    }

    #[tool(description = "Pick one terminal after a sibling close (DONE or CANCELLED).")]
    async fn vissue_resolve(
        &self,
        Parameters(args): Parameters<ResolveArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| ops::resolve_terminal(&layout, &args.issue_id, &args.state)),
        )
    }

    #[tool(description = "Update an issue's state, priority, or blocker edges.")]
    async fn vissue_update(
        &self,
        Parameters(args): Parameters<UpdateArgs>,
    ) -> Result<CallToolResult, McpError> {
        let outcome = self.layout_for_id(&args.issue_id).and_then(|layout| {
            ops::update_pred(
                &layout,
                &args.issue_id,
                args.state.as_deref(),
                priority_char(args.priority.as_ref()),
                args.block.as_deref(),
                args.unblock.as_deref(),
                UpdatePred {
                    if_state: args.if_state.as_deref(),
                    if_gen: args.if_gen,
                },
            )
        });
        text(outcome.map(|o| {
            let mut s = o.report;
            for hint in o.hints {
                s.push_str(&format!("[hint] {hint}\n"));
            }
            s
        }))
    }

    #[tool(description = "Claim an issue: move it to STARTED and stamp the claiming identity.")]
    async fn vissue_claim(
        &self,
        Parameters(args): Parameters<ClaimArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id).and_then(|layout| {
                agent::claim(&layout, &args.issue_id, args.force.unwrap_or(false))
            }),
        )
    }

    #[tool(
        description = "Append a dated report to an issue's body. Use this to record work that was done: the logbook holds one line per event, so a written report belongs in the body. Markdown is safe."
    )]
    async fn vissue_append(
        &self,
        Parameters(args): Parameters<AppendArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| ops::append_body(&layout, &args.issue_id, &args.text)),
        )
    }

    #[tool(description = "Add a dated note to an issue's logbook without touching state or claim.")]
    async fn vissue_note(
        &self,
        Parameters(args): Parameters<NoteArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| ops::note(&layout, &args.issue_id, &args.text)),
        )
    }

    #[tool(description = "Every live claim, oldest first: who holds what issue, and for how long.")]
    async fn vissue_claims(
        &self,
        Parameters(args): Parameters<ClaimsArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::claims(
            &self.layout,
            args.holder.as_deref(),
            args.project.as_deref(),
            args.json.unwrap_or(false),
        ))
    }

    #[tool(
        description = "Dated open work: deadlines and scheduled starts inside a horizon, overdue first."
    )]
    async fn vissue_agenda(
        &self,
        Parameters(args): Parameters<AgendaArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::agenda(
            &self.layout,
            args.days.unwrap_or(14),
            args.project.as_deref(),
        ))
    }

    #[tool(
        description = "Fold an inbox org file: each unstamped `* TODO` heading becomes an issue and the heading is stamped with the id in place."
    )]
    async fn vissue_fold(
        &self,
        Parameters(args): Parameters<FoldArgs>,
    ) -> Result<CallToolResult, McpError> {
        text({
            let pref = self.router.route(&args.project);
            ops::fold(&pref.layout, std::path::Path::new(&args.file), &pref.dir)
        })
    }

    #[tool(description = "Count issues, optionally filtered by project, state, or readiness.")]
    async fn vissue_count(
        &self,
        Parameters(args): Parameters<CountArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::count(
            &self.layout,
            args.project.as_deref(),
            args.state.as_deref(),
            args.ready.unwrap_or(false),
        ))
    }

    #[tool(description = "Substring search over ids, titles, properties, and bodies.")]
    async fn vissue_search(
        &self,
        Parameters(args): Parameters<SearchArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::search(
            &self.layout,
            &args.query,
            args.limit.unwrap_or(20),
        ))
    }

    #[tool(description = "Explain bounded Org and lexical connections around an issue.")]
    async fn vissue_related(
        &self,
        Parameters(args): Parameters<RelatedArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(self.layout_for_id(&args.issue_id).and_then(|layout| {
            report::related(
                &layout,
                &args.issue_id,
                args.depth.unwrap_or(2),
                args.limit.unwrap_or(20),
                args.format.as_deref().unwrap_or("text"),
            )
        }))
    }

    #[tool(description = "List issues whose PARENT property matches this id.")]
    async fn vissue_children(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| report::children(&layout, &args.issue_id)),
        )
    }

    #[tool(description = "List issues that refer to this id through any relation.")]
    async fn vissue_backlinks(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| report::backlinks(&layout, &args.issue_id)),
        )
    }

    #[tool(description = "Issues waiting on this id. Dependency hygiene alias for backlinks.")]
    async fn vissue_waiting_on(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| agent::waiting_on(&layout, &args.issue_id)),
        )
    }

    #[tool(description = "The first lines of an issue's file range, screened for secrets.")]
    async fn vissue_body_excerpt(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| agent::body_excerpt(&layout, &args.issue_id)),
        )
    }

    #[tool(
        description = "One issue's org text in full, untruncated, screened for secrets. Use this when handing an issue to someone as the thing to work from; body_excerpt is a capped preview."
    )]
    async fn vissue_org(
        &self,
        Parameters(args): Parameters<IdArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id)
                .and_then(|layout| agent::org_text(&layout, &args.issue_id)),
        )
    }

    #[tool(description = "Children and blockers below an id, as ascii indent or Graphviz DOT.")]
    async fn vissue_tree(
        &self,
        Parameters(args): Parameters<TreeArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(self.layout_for_id(&args.issue_id).and_then(|layout| {
            report::tree(
                &layout,
                &args.issue_id,
                args.format.as_deref().unwrap_or("ascii"),
            )
        }))
    }

    #[tool(description = "The blocker and parent graph as Graphviz DOT.")]
    async fn vissue_graph(
        &self,
        Parameters(args): Parameters<ProjectArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::graph(&self.layout, args.project.as_deref()))
    }

    #[tool(description = "A markdown roadmap of active and closed work.")]
    async fn vissue_roadmap(
        &self,
        Parameters(args): Parameters<ProjectArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::roadmap(&self.layout, args.project.as_deref()))
    }

    #[tool(description = "One JSON object per issue per line.")]
    async fn vissue_export(
        &self,
        Parameters(args): Parameters<ProjectArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(report::export(&self.layout, args.project.as_deref()))
    }

    #[tool(description = "Validate the corpus: dangling edges, bad dates, duplicate ids.")]
    async fn vissue_check(&self) -> Result<CallToolResult, McpError> {
        text(report::check(&self.layout).map(|r| r.text))
    }

    #[tool(
        description = "Rewrite files onto the Org / ELPA / vissue property split. Dry-run by default when dry_run is true."
    )]
    async fn vissue_normalize(
        &self,
        Parameters(args): Parameters<NormalizeArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(ops::normalize(
            &self.layout,
            args.project.as_deref(),
            args.dry_run.unwrap_or(false),
        ))
    }

    #[tool(description = "Checklist for agents and CI: stalled claims plus corpus validation.")]
    async fn vissue_hygiene(
        &self,
        Parameters(args): Parameters<HygieneArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(agent::hygiene(&self.layout, args.stale_days))
    }

    #[tool(
        description = "Content digest of the corpus: combined, per-project, issue count, generation."
    )]
    async fn vissue_digest(
        &self,
        Parameters(args): Parameters<DigestArgs>,
    ) -> Result<CallToolResult, McpError> {
        json(
            vissue_core::digest::corpus_digest(&self.layout, &args.projects.unwrap_or_default())
                .map(|d| d.to_json()),
        )
    }

    #[tool(description = "Check whether a mirror file's SYNC stamp still matches the tracker.")]
    async fn vissue_mirror_check(
        &self,
        Parameters(args): Parameters<MirrorCheckArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            mirror::check(
                &self.layout,
                std::path::Path::new(&args.path),
                &args.projects.unwrap_or_default(),
            )
            .map(|v| v.report),
        )
    }

    #[tool(description = "Render a read-only projection of selected projects.")]
    async fn vissue_mirror(
        &self,
        Parameters(args): Parameters<MirrorArgs>,
    ) -> Result<CallToolResult, McpError> {
        let format = match Format::parse(args.format.as_deref().unwrap_or("org")) {
            Ok(f) => f,
            Err(e) => return Err(McpError::invalid_params(format!("{e:#}"), None)),
        };
        text(mirror::render(
            &self.layout,
            &args.projects.unwrap_or_default(),
            format,
            args.state.as_deref(),
        ))
    }

    #[tool(
        description = "Change events with a sequence above `since`, plus the current generation."
    )]
    async fn vissue_events(
        &self,
        Parameters(args): Parameters<EventsArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(events::since_report(
            &self.layout,
            args.since.unwrap_or(0),
            args.limit.unwrap_or(50),
        ))
    }

    #[tool(description = "Append a manual event, waking pollers without editing an issue.")]
    async fn vissue_ping(
        &self,
        Parameters(args): Parameters<PingArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(events::ping_report(&self.layout, args.detail.as_deref()))
    }

    #[tool(description = "The generation counter. Compare against the last value seen.")]
    async fn vissue_gen(&self) -> Result<CallToolResult, McpError> {
        text(Ok::<_, vissue_core::error::Error>(format!(
            "{}\n",
            events::generation(&self.layout)
        )))
    }

    #[tool(description = "Report the server version and the resolved root and prefix.")]
    async fn vissue_identity(&self) -> Result<CallToolResult, McpError> {
        text(Ok::<_, vissue_core::error::Error>(identity_report(
            &self.layout,
            &self.router,
        )))
    }

    #[tool(description = "Transitive blocker ancestors, bounded by hop depth.")]
    async fn vissue_ancestors(
        &self,
        Parameters(args): Parameters<DepthArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id).and_then(|layout| {
                report::ancestors(&layout, &args.issue_id, args.depth.unwrap_or(3))
            }),
        )
    }

    #[tool(description = "Issues transitively waiting on this id, bounded by hop depth.")]
    async fn vissue_impact(
        &self,
        Parameters(args): Parameters<DepthArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(
            self.layout_for_id(&args.issue_id).and_then(|layout| {
                report::impact(&layout, &args.issue_id, args.depth.unwrap_or(3))
            }),
        )
    }

    #[tool(description = "Cycles in the blocker graph, or a line saying there are none.")]
    async fn vissue_cycles(&self) -> Result<CallToolResult, McpError> {
        text(report::cycles(&self.layout))
    }

    #[tool(description = "Move an issue heading to another project file.")]
    async fn vissue_refile(
        &self,
        Parameters(args): Parameters<RefileArgs>,
    ) -> Result<CallToolResult, McpError> {
        text(self.layout_for_id(&args.issue_id).and_then(|layout| {
            let dest = self.router.route(&args.to);
            ops::refile_to(&layout, &args.issue_id, &dest.layout, &dest.dir)
        }))
    }

    #[tool(
        description = "Block until the generation counter passes last, or until an issue is DONE or CANCELLED when until_terminal and id are set."
    )]
    async fn vissue_wait(
        &self,
        Parameters(args): Parameters<WaitArgs>,
    ) -> Result<CallToolResult, McpError> {
        if args.until_terminal.unwrap_or(false) {
            let Some(id) = args.id.as_deref() else {
                return Err(McpError::invalid_params(
                    "--until-terminal requires id",
                    None,
                ));
            };
            return text(
                events::wait_until_terminal(
                    &match self.layout_for_id(id) {
                        Ok(layout) => layout,
                        Err(e) => return text(Err(e)),
                    },
                    id,
                    args.poll_ms.unwrap_or(200),
                    args.timeout_ms.unwrap_or(10_000),
                )
                .map(|outcome| match outcome {
                    events::TerminalWait::Done { generation } => {
                        format!("DONE {generation}\n")
                    }
                    events::TerminalWait::Cancelled { generation } => {
                        format!("CANCELLED {generation}\n")
                    }
                    events::TerminalWait::Timeout { generation, state } => {
                        format!("TIMEOUT {state} {generation}\n")
                    }
                }),
            );
        }
        let last = args.last.unwrap_or(0);
        text(
            events::wait_generation(
                &self.layout,
                last,
                args.poll_ms.unwrap_or(200),
                args.timeout_ms.unwrap_or(10_000),
            )
            .map(|generation| {
                let timed_out = if generation <= last { " timeout" } else { "" };
                format!("{generation}{timed_out}\n")
            }),
        )
    }

    #[tool(description = "The identity a claim would record.")]
    async fn vissue_whoami(&self) -> Result<CallToolResult, McpError> {
        text(Ok::<_, vissue_core::error::Error>(format!(
            "{}\n",
            vissue_core::config::identity(&self.layout)
        )))
    }
}

fn create_routed(
    router: &Router,
    project: &str,
    title: &str,
    opts: CreateOpts<'_>,
) -> vissue_core::Result<String> {
    let pref = router.route(project);
    let extra = router.extra_ids_for(&pref.dir)?;
    let opts = CreateOpts {
        extra_ids: &extra,
        ..opts
    };
    ops::create(&pref.layout, &pref.dir, title, opts)
}

fn issues_json_routed(
    router: &Router,
    project: Option<&str>,
    state: Option<&str>,
    ready_only: bool,
) -> vissue_core::Result<serde_json::Value> {
    if let Some(p) = project {
        let pref = router.route(p);
        return agent::issues_json(&pref.layout, Some(&pref.dir), state, ready_only);
    }
    let mut rows = Vec::new();
    for pref in router.visible_projects()? {
        let value = agent::issues_json(&pref.layout, Some(&pref.dir), state, ready_only)?;
        if let Some(arr) = value.as_array() {
            rows.extend(arr.iter().cloned());
        }
    }
    Ok(serde_json::Value::Array(rows))
}

fn identity_report(layout: &Layout, router: &Router) -> String {
    let mut out = format!(
        "vissue-mcp {}\nprotocol: {}\nroot:   {}\nprefix: {}\nroot={}\nprefix={}\n",
        env!("CARGO_PKG_VERSION"),
        vissue_core::org::PROTOCOL_VERSION,
        layout.root().display(),
        layout.prefix(),
        layout.root().display(),
        layout.prefix()
    );
    if let Ok(prefs) = router.visible_projects() {
        for pref in prefs {
            if pref.key == pref.dir
                && pref.layout.root() == layout.root()
                && pref.layout.prefix() == layout.prefix()
            {
                continue;
            }
            out.push_str(&format!(
                "route: {} -> {} {} {}\n",
                pref.key,
                pref.layout.root().display(),
                pref.layout.prefix(),
                pref.dir
            ));
        }
    }
    out
}

#[tool_handler]
impl ServerHandler for VissueServer {
    fn get_info(&self) -> ServerInfo {
        ServerInfo::new(ServerCapabilities::builder().enable_tools().build())
            .with_server_info(Implementation::new("vissue", env!("CARGO_PKG_VERSION")))
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use vissue_core::config::DEFAULT_PREFIX;

    #[tokio::test]
    async fn tools_answer_against_a_temporary_layout() {
        let dir = tempfile::tempdir().unwrap();
        let layout = Layout::new(dir.path(), DEFAULT_PREFIX);
        std::fs::create_dir_all(layout.projects_dir()).unwrap();
        ops::create(&layout, "sample", "first", CreateOpts::default()).unwrap();

        let server = VissueServer::with_layout(layout);
        let listed = server
            .vissue_list(Parameters(ListArgs {
                project: None,
                state: None,
            }))
            .await
            .unwrap();
        assert_eq!(listed.is_error, Some(false));

        let counted = server
            .vissue_count(Parameters(CountArgs {
                project: None,
                state: None,
                ready: Some(true),
            }))
            .await
            .unwrap();
        assert_eq!(counted.is_error, Some(false));
    }

    /// The tools that write, exercised in the order an agent uses them.
    ///
    /// The read-only surface is covered above; the create/update/claim/note
    /// path was not, and it is the half that changes the corpus.
    #[tokio::test]
    async fn the_write_tools_carry_their_arguments_through_to_the_file() {
        let dir = tempfile::tempdir().unwrap();
        let layout = Layout::new(dir.path(), DEFAULT_PREFIX);
        std::fs::create_dir_all(layout.projects_dir()).unwrap();
        let server = VissueServer::with_layout(layout.clone());

        let made = server
            .vissue_create(Parameters(CreateArgs {
                project: "atlas".into(),
                title: "Rotate the signing key".into(),
                priority: Some("A".into()),
                issue_type: Some("chore".into()),
                tags: Some("ops,security".into()),
                parent: None,
                body: Some("The old one expires this quarter.".into()),
            }))
            .await
            .unwrap();
        assert_eq!(made.is_error, Some(false));

        let file = std::fs::read_to_string(layout.project_issues_path("atlas")).unwrap();
        assert!(file.contains("Rotate the signing key"), "{file}");
        assert!(file.contains("[#A]"), "priority not carried: {file}");
        assert!(file.contains(":TYPE:       chore"), "{file}");
        assert!(
            file.contains("expires this quarter"),
            "body missing: {file}"
        );
        assert!(
            file.contains(":ops:") && file.contains(":security:"),
            "{file}"
        );

        let id = file
            .lines()
            .find_map(|l| l.trim().strip_prefix(":ID:"))
            .map(|s| s.trim().to_string())
            .expect("an id");

        // Claim, then note: neither may disturb the other's stamp.
        assert_eq!(
            server
                .vissue_claim(Parameters(ClaimArgs {
                    issue_id: id.clone(),
                    force: None,
                }))
                .await
                .unwrap()
                .is_error,
            Some(false)
        );
        assert_eq!(
            server
                .vissue_note(Parameters(NoteArgs {
                    issue_id: id.clone(),
                    text: "waiting on the vault rotation window".into(),
                }))
                .await
                .unwrap()
                .is_error,
            Some(false)
        );
        // A written report goes into the body, where markdown is safe.
        assert_eq!(
            server
                .vissue_append(Parameters(AppendArgs {
                    issue_id: id.clone(),
                    text: "## What changed\n\n* rotated the key\n".into(),
                }))
                .await
                .unwrap()
                .is_error,
            Some(false)
        );

        let after = std::fs::read_to_string(layout.project_issues_path("atlas")).unwrap();
        assert!(after.contains("## What changed"), "{after}");
        assert!(after.contains(":CLAIMED_BY:"), "{after}");
        assert!(after.contains("vault rotation window"), "{after}");

        // Closing reports the change; the tool surfaces hints alongside it.
        let closed = server
            .vissue_update(Parameters(UpdateArgs {
                issue_id: id.clone(),
                state: Some("DONE".into()),
                priority: Some("C".into()),
                block: None,
                unblock: None,
                if_state: None,
                if_gen: None,
            }))
            .await
            .unwrap();
        assert_eq!(closed.is_error, Some(false));
        let done = std::fs::read_to_string(layout.project_issues_path("atlas")).unwrap();
        assert!(done.contains("DONE"), "{done}");
        assert!(done.contains("[#C]"), "{done}");
    }

    #[tokio::test]
    async fn a_write_tool_reports_an_unknown_id_as_an_error() {
        let dir = tempfile::tempdir().unwrap();
        let layout = Layout::new(dir.path(), DEFAULT_PREFIX);
        std::fs::create_dir_all(layout.projects_dir()).unwrap();
        let server = VissueServer::with_layout(layout);

        let err = server
            .vissue_note(Parameters(NoteArgs {
                issue_id: "atlas-zzzz".into(),
                text: "into the void".into(),
            }))
            .await
            .unwrap_err();
        assert!(format!("{err:?}").contains("atlas-zzzz"), "{err:?}");
    }

    #[tokio::test]
    async fn an_unknown_mirror_format_is_an_invalid_parameter() {
        let dir = tempfile::tempdir().unwrap();
        let layout = Layout::new(dir.path(), DEFAULT_PREFIX);
        let server = VissueServer::with_layout(layout);
        let err = server
            .vissue_mirror(Parameters(MirrorArgs {
                projects: None,
                format: Some("pdf".into()),
                state: None,
            }))
            .await
            .unwrap_err();
        assert!(format!("{err:?}").contains("pdf"), "{err:?}");
    }

    #[tokio::test]
    async fn read_only_tools_cover_the_fixture_tracker_surface() {
        let root =
            std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../../tests/fixture_vault");
        let server = VissueServer::with_layout(Layout::new(&root, DEFAULT_PREFIX));

        assert!(
            !server
                .vissue_projects()
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_list(Parameters(ListArgs {
                    project: Some("atlas".into()),
                    state: Some("TODO".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_ready(Parameters(ProjectArgs {
                    project: Some("atlas".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_show(Parameters(IdArgs {
                    issue_id: "atlas-2c3d".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_claims(Parameters(ClaimsArgs {
                    holder: None,
                    project: Some("atlas".into()),
                    json: Some(true),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_agenda(Parameters(AgendaArgs {
                    days: Some(7),
                    project: Some("atlas".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_search(Parameters(SearchArgs {
                    query: "fixture".into(),
                    limit: Some(5),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_related(Parameters(RelatedArgs {
                    issue_id: "atlas-1a2b".into(),
                    depth: Some(2),
                    limit: Some(5),
                    format: Some("org".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_children(Parameters(IdArgs {
                    issue_id: "atlas-1a2b".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_backlinks(Parameters(IdArgs {
                    issue_id: "atlas-1a2b".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_waiting_on(Parameters(IdArgs {
                    issue_id: "atlas-1a2b".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_org(Parameters(IdArgs {
                    issue_id: "atlas-2c3d".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_body_excerpt(Parameters(IdArgs {
                    issue_id: "atlas-2c3d".into(),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_tree(Parameters(TreeArgs {
                    issue_id: "atlas-1a2b".into(),
                    format: Some("ascii".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_graph(Parameters(ProjectArgs {
                    project: Some("atlas".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_roadmap(Parameters(ProjectArgs {
                    project: Some("atlas".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_export(Parameters(ProjectArgs {
                    project: Some("atlas".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_check()
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_hygiene(Parameters(HygieneArgs {
                    stale_days: Some(30)
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_digest(Parameters(DigestArgs {
                    projects: Some(vec!["atlas".into()]),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_mirror(Parameters(MirrorArgs {
                    projects: Some(vec!["atlas".into()]),
                    format: Some("markdown".into()),
                    state: Some("TODO".into()),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_events(Parameters(EventsArgs {
                    since: Some(0),
                    limit: Some(10),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(!server.vissue_gen().await.unwrap().is_error.unwrap_or(false));
        assert!(
            !server
                .vissue_identity()
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_ancestors(Parameters(DepthArgs {
                    issue_id: "atlas-3e4f".into(),
                    depth: Some(2),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_impact(Parameters(DepthArgs {
                    issue_id: "atlas-1a2b".into(),
                    depth: Some(2),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_cycles()
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_whoami()
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_wait(Parameters(WaitArgs {
                    last: Some(0),
                    id: None,
                    until_terminal: None,
                    poll_ms: Some(10),
                    timeout_ms: Some(30),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        assert!(
            !server
                .vissue_wait(Parameters(WaitArgs {
                    last: None,
                    id: Some("atlas-4g5h".into()),
                    until_terminal: Some(true),
                    poll_ms: Some(10),
                    timeout_ms: Some(200),
                }))
                .await
                .unwrap()
                .is_error
                .unwrap_or(false)
        );
        let info = server.get_info();
        assert!(info.capabilities.tools.is_some());
    }
}