lean_ctx/rules_inject/
content.rs

1//! The rules/skill payloads lean-ctx injects: shared + dedicated markdown,
2//! Cursor MDC frontmatter, and per-agent rule paths.
3//!
4//! Rule CONTENT is delegated to `core::rules_canonical` — this module only
5//! handles format dispatch and the Cursor-specific frontmatter.
6
7use std::path::{Path, PathBuf};
8
9use super::RulesFormat;
10use crate::core::config::CompressionLevel;
11use crate::core::rules_canonical::{self as rc, Wrapper};
12
13/// The wrapper a Cursor mdc at `mdc_path` should carry (GL #1153): the
14/// honest `HookCovered` profile when the sibling `hooks.json` (always under
15/// the same `.cursor/` dir) shows lean-ctx compressing the native tools,
16/// otherwise the full `Dedicated` mapping. Path-derived so isolated test
17/// homes and the real `~/.cursor` behave identically.
18pub(super) fn cursor_wrapper_for_mdc(mdc_path: &Path) -> Wrapper {
19    let covered = mdc_path
20        .parent()
21        .and_then(Path::parent)
22        .is_some_and(|cursor_dir| {
23            crate::core::rules_channel::cursor_hooks_json_covers(&cursor_dir.join("hooks.json"))
24        });
25    if covered {
26        Wrapper::HookCovered
27    } else {
28        Wrapper::Dedicated
29    }
30}
31
32/// Wrap a rendered rules body in the Cursor mdc frontmatter. The description
33/// stays profile-neutral: whether native tools are replaced (Dedicated) or
34/// hook-covered (GL #1153) is stated by the body itself.
35pub(crate) fn cursor_mdc_document(body: &str) -> String {
36    format!(
37        "---\n\
38         description: \"lean-ctx: context compression layer — \
39         tool guidance in rule body.\"\n\
40         globs: **/*\n\
41         alwaysApply: true\n\
42         ---\n\n\
43         {body}"
44    )
45}
46
47pub(super) fn rules_content(
48    format: &RulesFormat,
49    level: CompressionLevel,
50    wrapper: Wrapper,
51) -> String {
52    let shadow = crate::core::config::Config::load().shadow_mode;
53    match format {
54        RulesFormat::SharedMarkdown => rc::render(shadow, Wrapper::Shared, level),
55        RulesFormat::DedicatedMarkdown => rc::render(shadow, Wrapper::Dedicated, level),
56        RulesFormat::CursorMdc => cursor_mdc_document(&rc::render(shadow, wrapper, level)),
57    }
58}
59
60pub fn opencode_dedicated_rules_path(home: &std::path::Path) -> PathBuf {
61    home.join(".config/opencode/rules/lean-ctx.md")
62}
63
64pub fn gemini_dedicated_rules_path(home: &std::path::Path) -> PathBuf {
65    home.join(".gemini").join(GEMINI_DEDICATED_CONTEXT_FILENAME)
66}
67
68/// The `context.fileName` entry registered for Gemini in dedicated mode.
69pub const GEMINI_DEDICATED_CONTEXT_FILENAME: &str = "LEANCTX.md";
lean_ctx/rules_inject/content.rs

lean_ctx/rules_inject/
content.rs
