agent-stuff

Reusable building blocks for AI coding agents — skills, standalone scripts, and hooks — written once and shared everywhere.

Works with Claude Code, Codex, Pi, and any agent that reads skills from a directory. A skill is a plain SKILL.md; the installer projects the same source files into whichever agents you use.

plugins/   skills, grouped by domain (each domain = a Claude Code plugin)
scripts/   standalone CLIs an agent runs inside the repo it's working in
hooks/     Claude Code event hooks
bin/       machinery: installer, validator, tests, and the agent-target registry

Install skills

Requires uv:

# macOS / Linux
curl -LsSf https://astral.sh/uv/install.sh | sh
# Windows (PowerShell)
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

git clone https://github.com/Lightbridge-KS/agent-stuff.git
cd agent-stuff

uv run bin/install.py --list            # skills + which agents are detected
uv run bin/install.py --all --dry-run   # preview, no writes
uv run bin/install.py --all             # install all skills into every agent present

Target specific agents (combine freely), or any directory:

uv run bin/install.py --claude                 # ~/.claude/skills      (Claude Code)
uv run bin/install.py --codex                  # ~/.codex/skills       (Codex)
uv run bin/install.py --pi                      # ~/.pi/agent/skills    (Pi)
uv run bin/install.py --agents                  # ~/.agents/skills      (shared convention)
uv run bin/install.py --claude --codex --pi    # several at once
uv run bin/install.py --target ~/some/dir      # a custom directory

uv run bin/install.py --claude coding/c4-architect   # one skill
uv run bin/install.py --claude --domain radiology    # a whole domain

--mode defaults to auto: symlink on macOS/Linux (edits in this checkout are live), copy on Windows. Override with --mode symlink|copy. --force replaces an installed skill (guarded so it can never delete the source).

Agents are configured in bin/targets.toml — one block per agent. Add a new agent there and its --<name> flag appears automatically; no code change.

Claude Code plugin marketplace (Claude Code only)

/plugin marketplace add Lightbridge-KS/agent-stuff
/plugin install coding@lightbridge-skills
/plugin install radiology@lightbridge-skills
/plugin install lightbridge@lightbridge-skills
/plugin install productivity@lightbridge-skills
/plugin install research@lightbridge-skills

/plugin marketplace update lightbridge-skills refreshes the catalog later.

Scripts

Standalone CLIs an agent runs inside the project it's working in. Each is a self-contained uv run --script with its own README.

• scripts/docs-index — print a compact, read-before-coding index of a repo's docs/ from each file's frontmatter (summary / read_when). A Python+uv port of Peter Steinberger's docs-list.ts.
• scripts/lightbridge — the canonical resolver and CLI for user-level .lightbridge project config (~/.lightbridge/projects/<key>/config.toml). Every other script and hook here reads its opt-in state through this one.
• scripts/handoff — handoff storage for a repo: a pulled journal and a pushed inbox, so one session (or a sibling repo) can leave the next one a note.
• scripts/plan-store — durable, project-keyed, status-bearing plans; the filing system Claude Code's plan mode never had.
• scripts/repo-links — resolve a repo's declared cross-repo links to verified local paths, so personal paths never get committed.

Hooks

Event hooks for Claude Code and Codex — SessionStart for the context injectors, PreToolUse/PostToolUse(ExitPlanMode) for the plan pair. Each is described by an agent-neutral hook.toml; the installer renders it into every agent's registration form (Claude settings.json, Codex hooks.json / config.toml) with paths resolved. It only prints — it never edits settings:

uv run bin/install.py --hooks

• hooks/docs-index-inject — a SessionStart hook that injects the project's docs index into context automatically, pairing with docs-index. Registered once (user settings) but opt-in per project: it only fires where a [docs-index] section is declared in the project's user-level lightbridge config (~/.lightbridge/projects/<key>/config.toml), so repos with no docs — or a website docs/ — are untouched. (Codex additionally requires trusting the hook via /hooks.)
• hooks/repo-links-inject — a SessionStart hook that injects the repo's resolved cross-repo links, pairing with repo-links. Dead links surface as warnings; no registry on the machine means silence.
• hooks/handoff-inject — a SessionStart hook that announces the handoffs pushed at this repo, pairing with handoff, so an agent learns a sibling repo changed something it depends on before touching code.
• hooks/plan-capture — PostToolUse(ExitPlanMode); files the approved plan into the project's plan store instead of Claude Code's flat ~/.claude/plans/. Pairs with plan-store.
• hooks/plan-gate — PreToolUse(ExitPlanMode); opt-in auto-approve for the plan dialog. Silent unless [plans].auto_approve = true.

All five are registered once in user settings and fail open and quiet when they have nothing to contribute. Four gate on a lightbridge config section ([docs-index], [repo-links], [plans]); handoff-inject needs no section — it stays silent until a handoff is actually pushed at the repo.

Develop

uv run bin/validate.py        # SKILL.md + manifests + scripts/hooks contracts
just test                     # the whole tests/ suite (8 files)

Editing guide and contracts: CLAUDE.md (a.k.a. AGENTS.md). Design rationale: docs/architecture.md. CI runs the validator and tests on every PR.

License

MIT © Kittipos S. (Lightbridge-KS)