Repository Context Builder
You gather repository context by detecting projects, summarizing their architecture, and writing the results to repo.md. Do all work yourself — do not spawn subagents or delegate.
Inputs
Parse these from $ARGUMENTS (key=value pairs):
- repo_path: path to the repository root
- cache_dir: path to the cache directory (defaults to
~/.ghost/repos/<repo_id>/cache)
$ARGUMENTS
If cache_dir is not provided, compute it:
repo_name=$(basename "$(pwd)") && remote_url=$(git remote get-url origin 2>/dev/null || pwd) && short_hash=$(printf '%s' "$remote_url" | git hash-object --stdin | cut -c1-8) && repo_id="${repo_name}-${short_hash}" && cache_dir="$HOME/.ghost/repos/${repo_id}/cache" && echo "cache_dir=$cache_dir"
Tool Restrictions
Do NOT use WebFetch or WebSearch. All work must use only local files in the repository.
Setup
Discover this skill's own directory so you can reference agent files:
skill_dir=$(find . -path '*/skills/repo-context/SKILL.md' 2>/dev/null | head -1 | xargs dirname)
echo "skill_dir=$skill_dir"
Check Cache First
Check if <cache_dir>/repo.md already exists. If it does, skip everything and return:
Repository context is at: <cache_dir>/repo.md
If it does not exist, run mkdir -p <cache_dir> and continue.
Workflow
Detect Projects — Read <skill_dir>/detector.md and follow its instructions against <repo_path>. Save the full detection output (project details needed for step 2). If detection finds no projects, write a minimal repo.md noting "No projects detected" and skip to step 4.
Summarize Each Project — Read <skill_dir>/summarizer.md. For EACH project detected in step 1, follow the summarizer instructions using that project's details (id, type, base_path, languages, frameworks, dependency_files, extensions, evidence). Collect the summary for each project. If summarization fails for a project, note it as "summary unavailable" and continue with remaining projects.
Write repo.md — Combine detection and summary results into <cache_dir>/repo.md using the format in <skill_dir>/template-repo.md. For each project include:
- Detection: ID, Type, Base Path, Languages, Frameworks, Dependency Files, Extensions, Evidence
- Summary: Architectural summary, Sensitive Data Types, Business Criticality, Component Map, Evidence
Validate — Read <cache_dir>/repo.md back and verify it contains the expected sections from <skill_dir>/template-repo.md (e.g., project entries with Detection and Summary fields). If the file is missing or malformed, retry the write once before reporting an error.
Output — Return: Repository context is at: <cache_dir>/repo.md
1---2name: ghost-repo-context3description: Scans directory structure, detects projects, maps dependencies, and documents code organization into a repo.md file. Use when the user needs a codebase overview, project structure map, or repository context before security analysis.4license: apache-2.05---6
7# Repository Context Builder
8
9You gather repository context by detecting projects, summarizing their architecture, and writing the results to `repo.md`. Do all work yourself — do not spawn subagents or delegate.
10
11## Inputs
12
13Parse these from `$ARGUMENTS` (key=value pairs):
14- **repo_path**: path to the repository root
15- **cache_dir**: path to the cache directory (defaults to `~/.ghost/repos/<repo_id>/cache`)
16
17$ARGUMENTS
18
19If `cache_dir` is not provided, compute it:
20```bash
21repo_name=$(basename "$(pwd)") && remote_url=$(git remote get-url origin 2>/dev/null || pwd) && short_hash=$(printf '%s' "$remote_url" | git hash-object --stdin | cut -c1-8) && repo_id="${repo_name}-${short_hash}" && cache_dir="$HOME/.ghost/repos/${repo_id}/cache" && echo "cache_dir=$cache_dir"
22```
23
24## Tool Restrictions
25
26Do NOT use WebFetch or WebSearch. All work must use only local files in the repository.
27
28## Setup
29
30Discover this skill's own directory so you can reference agent files:
31```bash
32skill_dir=$(find . -path '*/skills/repo-context/SKILL.md' 2>/dev/null | head -1 | xargs dirname)
33echo "skill_dir=$skill_dir"
34```
35
36---
37
38## Check Cache First
39
40Check if `<cache_dir>/repo.md` already exists. If it does, skip everything and return:
41
42```
43Repository context is at: <cache_dir>/repo.md
44```
45
46If it does not exist, run `mkdir -p <cache_dir>` and continue.
47
48---
49
50## Workflow
51
521. **Detect Projects** — Read `<skill_dir>/detector.md` and follow its instructions against `<repo_path>`. Save the full detection output (project details needed for step 2). If detection finds no projects, write a minimal `repo.md` noting "No projects detected" and skip to step 4.
53
542. **Summarize Each Project** — Read `<skill_dir>/summarizer.md`. For EACH project detected in step 1, follow the summarizer instructions using that project's details (id, type, base_path, languages, frameworks, dependency_files, extensions, evidence). Collect the summary for each project. If summarization fails for a project, note it as "summary unavailable" and continue with remaining projects.
55
563. **Write repo.md** — Combine detection and summary results into `<cache_dir>/repo.md` using the format in `<skill_dir>/template-repo.md`. For each project include:
57 - Detection: ID, Type, Base Path, Languages, Frameworks, Dependency Files, Extensions, Evidence
58 - Summary: Architectural summary, Sensitive Data Types, Business Criticality, Component Map, Evidence
59
604. **Validate** — Read `<cache_dir>/repo.md` back and verify it contains the expected sections from `<skill_dir>/template-repo.md` (e.g., project entries with Detection and Summary fields). If the file is missing or malformed, retry the write once before reporting an error.
61
625. **Output** — Return: `Repository context is at: <cache_dir>/repo.md`
ghostsecurity