cc-arch-hands (cah)

Installer for the artifacts that turn Claude Code into an architect's workshop: per-model slash-commands, per-model delegated sub-agents, and skills. Zero runtime dependencies — only Node.js built-ins.

npx cc-arch-hands install        # that's it — installs commands, agents & skills into ~/.claude/

Other ways to run: npm global install, from source. Full command reference in Use.

What it installs

Three kinds of Claude Code artifacts under ~/.claude/ (commands, agents, skills), all generated from a single model registry so they stay in lockstep — plus the three companion bins that some skills use as hooks or statusLine commands, copied into ~/.claude/cah-bin/ at install time.

The artifacts:

• per-model slash-commands (35) under ~/.claude/commands/,
• per-model sub-agents (35) under ~/.claude/agents/,
• skills (10) under ~/.claude/skills/,
• companion bins under ~/.claude/cah-bin/ (since 0.4.0).

Since 0.4.0: cah install copies the companion bins into ~/.claude/cah-bin/ and settings.json references them by absolute path (node "<HOME>/.claude/cah-bin/bin/cah-status.js") rather than a bare PATH name. This means /clock and /checkpoint-watch keep working even if the cc-arch-hands npm package is moved, relinked, or uninstalled. Re-running /clock (or /checkpoint-watch) migrates a pre-0.4.0 bare-name command to the new absolute path automatically.

The companion bins:

• cah (and its alias cc-arch-hands) — the installer CLI itself.
• cah-checkpoint-hint — Stop hook bin invoked by /checkpoint-watch. Emits one [hint] Context at 90%… per session when context fills past 90%.
• cah-status — statusLine command invoked by /clock. Renders <model> [effort] · X.XX% (Nk/Mk) with a usage bar and, for Pro/Max accounts, the 5-hour and weekly quota use with reset info (5h N% →48м · wk N% →сб 27.06 16:19). The bracketed effort code matches the slash-command suffix convention — [l]/[m]/[h]/[x]/[xx] for low/medium/high/xhigh/max; omitted for models without effort support (Haiku). Refreshes every 60 s (refreshInterval on the entry) and on every turn boundary.
• cah-stamp — Stop hook bin invoked by /clock on both Stop AND PostToolUse. Emits an HH:MM:SS · model [effort] · X.XX% · 5h N% · wk N% line as a systemMessage (no bars, compact text). Two safeguards prevent scrollback spam: per-message dedup (every assistant entry of the same turn shares an API requestId — if we already stamped this turn, the next hook of the same turn is suppressed) and a time-throttle safety net (default 10 s, configurable via CAH_STAMP_MIN_INTERVAL_MS).
• cah-status-probe — diagnostic statusLine bin armed by cah probe statusline start. Captures the raw stdin envelope to a JSONL log so you can inspect exactly which fields Claude Code delivers on your account (added in 0.4.1).

All three hook bins share lib/transcript-stats.js for transcript parsing — including the cache-aware token sum (input_tokens + cache_creation_input_tokens + cache_read_input_tokens) that matches Claude Code's own used_percentage formula. Without this, raw input_tokens after the first turn is ~1 token (everything else is served from the prompt cache) and a naive percentage would always read 0%.

1. Per-model slash-commands (36)

A short slash-command for every {model, effort} pair, so you can switch the model and reasoning effort for a single turn just by how you start the message. The command name encodes both — model letter + version + effort suffix:

/oh   run this turn on Opus (top) at high effort
/o47x run this turn on Opus 4.7 at xhigh effort
/sm   Sonnet (top), medium effort
/fxx  Fable 5, max effort
/hl   Haiku, low effort

Suffixes: l low · m medium · h high · x xhigh · xx max. Whatever you type after the command becomes the prompt for that turn.

2. Per-model sub-agents (36)

The same matrix as the commands — but as delegated sub-agents instead of inline commands. Use them to hand a self-contained task to a fresh context window on a chosen model/effort; the agent runs autonomously and returns only the result. Each agent body carries two hardcoded safety clauses: a git-safety rule (no mutating git commands in a shared worktree) and a test-scope rule (run only scoped tests, not the whole suite).

v0.2.0 dropped the a prefix on agent names. Old aoh, ao47x, afxx are now plain oh, o47x, fxx — the same string as the command and the model selector. Slash commands and the Agent tool use separate lookup tables, so there is no namespace collision. Upgrade is automatic: cah install 0.2.0 deletes the old a*.md files (sentinel-gated) and writes the new ones; cah uninstall cleans both layouts.

Naming matrix

Command name = model letter (+ version) + effort suffix. The agent name is the same string (no prefix). Effort suffixes: l low · m medium · h high · x xhigh · xx max.

Rows are sorted by tier (strongest first). Bold rows are top shortcuts that always point at the freshest version of each family — use them when you don't care about pinning an exact version.

Slash-commands

Model	model id	low	medium	high	xhigh	max
Fable (top)	claude-fable-5	/fl	/fm	/fh	/fx	/fxx
Opus (top)	claude-opus-4-8	/ol	/om	/oh	/ox	/oxx
Opus 4.7	claude-opus-4-7	/o47l	/o47m	/o47h	/o47x	/o47xx
Opus 4.6	claude-opus-4-6	/o46l	/o46m	/o46h	/o46x	/o46xx
Sonnet (top)	claude-sonnet-4-6	/sl	/sm	/sh	—	/sxx
Sonnet 4.6	claude-sonnet-4-6	/s46l	/s46m	/s46h	—	—
Sonnet 4.5	claude-sonnet-4-5	/s45l	/s45m	/s45h	—	—
Haiku (top)	claude-haiku-4-5	/hl	/hm	/hh	—	—
Haiku 4.5	claude-haiku-4-5	/h45l	/h45m	/h45h	—	—

Sub-agents share the same names as the commands above. /oh is the slash-command body; oh (no prefix) is the agent invoked by the Agent tool with subagent_type: "oh". The two live in separate lookup tables inside Claude Code, so identical names do not collide.

35 commands, 35 agents — one line per row-cell in lib/manifest.js.

3. Skills (10)

Reusable capability packs Claude Code loads on demand. Each is invoked as /skill-name from a chat. Grouped by purpose:

Onboarding

Skill	Purpose
/repo-sight	Diagnose an unfamiliar repository from its git history, structure and behavior before reading code, and return a ranked reading list with explicit caveats.

Planning & execution

Skill	Purpose
/task	Analyze a free-form request, decompose it into prioritized sub-tasks with dependencies, and register them in the session via TaskCreate. Plans only — does not execute. Usage: /task <description>.
/babygoal	Investigate the problem domain first (skipped if already covered by the session — uses /repo-sight or focused reads when needed), choose an execution strategy, decompose the work into tasks via TaskCreate with the strategy and key findings recorded in each description, mark the first ready task in_progress, and hand off to /babysit. TaskList-driven — does NOT use /goal. Usage: /babygoal [interval] <description>.
/babysit	Start a /loop (default 15m) that monitors the TaskList: resumes stalled in_progress tasks, picks the next ready pending when nothing is in flight, and stops itself when the list has no open tasks. Usage: /babysit [interval].

Session memory

Skill	Purpose
/checkpoint	Persist current session state (active /goal, TaskList with blockedBy, recent decisions, open questions, repo state) to a markdown file under docs/checkpoints/. Usage: /checkpoint (auto-timestamped) or /checkpoint <name> (named, re-runs overwrite).
/resume	Reload a checkpoint, rebuild the TaskList via TaskCreate, restate the goal as a copy-paste line, surface open questions. Usage: /resume (most recent), /resume <name> (exact or prefix), /resume --list (browse without restoring).
/checkpoint-prune	Delete checkpoints. Arg auto-detected: <name> (one file), 14d/48h (older than), bare number (keep last N), no arg (all). Confirms before batch deletes; --dry reports only. Usage: /checkpoint-prune, /checkpoint-prune 14d, /checkpoint-prune 10, /checkpoint-prune <name>.
/triage	TaskList hygiene — flag stale in_progress, orphan blockers, dead-end chains, trivial sibling clusters, completed clutter, duplicate subjects. Advisory by default; asks before mutating. Usage: /triage or /triage --dry.
/checkpoint-watch	Per-project Stop hook that shows a one-time [hint] when context hits 90%, suggesting /checkpoint. /checkpoint-watch --off to remove, --status to inspect.

Workspace HUD

Skill

Purpose

/clock

Per-scope Claude Code statusLine showing <model> [effort] · X% (Nk/Mk) at the bottom of the terminal, plus a Stop+PostToolUse hook that emits an HH:MM:SS · <model> [effort] · X% line as a systemMessage once per assistant turn (per-message dedup) for a timestamped chat audit trail. statusLine refreshes every 60 s and on every turn boundary. Does not consume LLM context. Usage: /clock (global), /clock --here (project-local), /clock --off, /clock --status.

Workspace HUD in detail

/clock installs two complementary signals into the same settings.json:

• statusLine (cah-status process): a persistent one-line bar at the bottom of the terminal that refreshes every 60 s (and on every turn boundary) and shows <model> [effort] · X% (Nk/Mk) plus, for Pro/Max accounts, the 5-hour and weekly quota use. It runs as a separate process and never enters LLM context.
• chat turn-stamp (cah-stamp on Stop AND PostToolUse): once per assistant turn, the hook reads the session transcript JSONL to find the latest usage.input_tokens, model, and per-turn API requestId, then emits an HH:MM:SS · model [effort] · X% line as a systemMessage that lands in the chat scrollback. Per-message dedup (via requestId) guarantees one stamp per assistant message — even a long turn with many tool calls produces exactly one stamp. The systemMessage is user-facing only and does not add any tokens to the LLM context.

Both pieces are installed together by /clock, removed together by /clock --off, and reported together by /clock --status. Foreign entries in either surface are never touched.

Session memory in detail

/checkpoint and /resume pair up to survive auto-compaction, machine switches, and long pauses. The flow:

# In a session, before a context compact or before stepping away:
/checkpoint pre-refactor       # writes docs/checkpoints/pre-refactor.md
                               # (or ~/.claude/checkpoints/ if not in a git repo)

# Iteratively update the same named checkpoint as work progresses:
/checkpoint pre-refactor       # overwrites the same file

# Later — same session after compact, or a brand-new session:
/resume --list                 # see what's available
/resume pre-refactor           # restore TaskList + goal + decisions + open questions

# Housekeeping when the directory fills up:
/checkpoint-prune 14d            # drop anything older than two weeks
/checkpoint-prune 5              # keep the 5 most recent, delete the rest
/checkpoint-prune pre-refactor   # remove one specific checkpoint
/checkpoint-prune                # delete ALL (asks to confirm)
# (or just `rm docs/checkpoints/<name>.md` — it's a plain file)

What goes into a checkpoint:

• Session summary — a 5–15 sentence narrative recap in the agent's own words: what's being worked on, what's done, what's in flight, what hypotheses are alive, what files/URLs were inspected, what timers are running. This is the part that survives auto-compact — the structured fields below stay accurate by themselves, but qualitative context only survives if it's written down here.
• Active goal — the current /goal Stop-hook condition, verbatim.
• TaskList snapshot — every task with id, status, subject, blockedBy, grouped by status.
• Decision log — up to 5 recent material decisions (chose X over Y because Z) extracted from conversation context.
• Open questions — anything flagged as needing user input.
• Repo state — git status --short and git log --oneline -5.

Empty sections stay empty with a one-line reason — the skill never invents content to look complete. Checkpoints are not added to git automatically; that decision stays with you.

cah also installs /checkpoint-watch globally, but invoking it in a project writes a Stop hook into that project's .claude/settings.json (never the global one). On each turn the hook reads the session transcript, takes the latest assistant message's usage.input_tokens, and compares it to the model's context limit (1M for Opus/Fable, 200K for Sonnet/Haiku). When usage first crosses 90% it emits a single systemMessage — a plain-ASCII [hint] line suggesting /checkpoint — and records a per-session marker so it never fires twice. The 90% threshold is a soft suggestion, not a forced action: the agent keeps working and you decide when to actually checkpoint. Foreign hooks in settings.json are never touched; /checkpoint-watch --off removes only our sentinel-tagged entry.

What /resume does:

1. Locates the checkpoint directory (repo-local first, ~/.claude/ fallback).
2. With --list: prints a table (name, size, mtime, title) and stops.
3. Otherwise resolves the target file by exact-match or prefix-match (ambiguous prefix → asks, never silently picks).
4. Re-creates pending/in_progress tasks via TaskCreate, re-wires blockedBy by subject matching (IDs will differ from the snapshot).
5. Prints the prior goal as a copy-paste /goal <text> block — /goal is a user-side command, so you re-arm the Stop hook yourself.
6. Warns if the checkpoint is older than 7 days, since repo state may have drifted.

Where it goes

Artifact	Count	Destination
Slash-commands	35	<scope>/.claude/commands/<name>.md
Sub-agents	35	<scope>/.claude/agents/<name>.md
Skills	10	<scope>/.claude/skills/<name>/

<scope> is ~/ by default (global install). Use --local or --cwd to target a specific project directory instead.

The /crush slash-command is intentionally NOT installed by cah — it belongs to the crush fork and is owned by its own claude-init command.

Quick start

No install needed — run directly with npx:

npx cc-arch-hands install                # install globally into ~/.claude/
npx cc-arch-hands uninstall              # remove everything we own
npx cc-arch-hands list                   # show what's installed
npx cc-arch-hands doctor                 # health check

Or install globally for repeated use:

npm install -g cc-arch-hands
cah install                              # same as npx, but faster (no download)

From source

git clone https://github.com/PHPCraftdream/cc-arch-hands
cd cc-arch-hands

# Install globally into ~/.claude/ (idempotent — safe to re-run):
./install.sh                    # Linux/macOS/BSD
install.bat                     # Windows

# Reinstall (clean uninstall + install):
./reinstall.sh
reinstall.bat

# Uninstall:
./uninstall.sh
uninstall.bat

All wrapper scripts forward flags, e.g. ./install.sh --only skills or install.bat --local.

Use

Via npx (no install):

npx cah install                          # global (default): ~/.claude/{commands,agents,skills,cah-bin}
npx cah install --local                  # local: <cwd>/.claude/... (must already exist); bins still go global
npx cah install --cwd /path/to/project   # local at a specific path; bins still go global

# --only takes install classes, individual skill names, or any mix.
npx cah install --only skills                       # all 10 skills
npx cah install --only bins                         # companion bins (cah-status, cah-stamp,
                                                    #   cah-checkpoint-hint, cah-status-probe,
                                                    #   + their shared lib/transcript-stats.js)

# One example per skill (every installable artefact has its own line).
# clock and checkpoint-watch auto-pull `bins` with a notice.
npx cah install --only repo-sight
npx cah install --only babysit
npx cah install --only babygoal
npx cah install --only task
npx cah install --only checkpoint
npx cah install --only checkpoint-prune
npx cah install --only resume
npx cah install --only triage
npx cah install --only checkpoint-watch             # auto-pulls bins
npx cah install --only clock                        # auto-pulls bins

# Comma-separated combos work as expected.
npx cah install --only clock,checkpoint-watch       # two skills (auto-pulls bins once)
npx cah install --only babysit,babygoal,task        # task-list trio
npx cah install --only commands,clock               # mix class + skill name

# reinstall and uninstall accept the same --only selector.
# reinstall does uninstall + install with the same args, so subset is honoured.
# uninstall is explicit-only — it never auto-pulls deps (so you can drop
# clock without losing the bins that checkpoint-watch needs).
npx cah reinstall --only clock                      # uninstall + install of just the clock skill
npx cah uninstall                                   # symmetric remove (sentinel-gated)
npx cah uninstall --only agents                     # remove only agents
npx cah uninstall --only clock                      # remove only the clock skill, keep bins

npx cah list                             # tabular: NAME | KIND | STATE
npx cah list --json                      # NDJSON for scripting
npx cah doctor                           # condensed health verdict
npx cah version                          # version + counts

npx cah probe statusline start           # diagnostic: capture raw statusLine envelope
npx cah probe statusline stop            # restore + print captured envelope
npx cah probe statusline status          # is the probe armed?

cah probe statusline atomically rewires settings.statusLine to a capturing bin and backs up the original. stop restores the original and prints the parsed envelope so you can see exactly which fields Claude Code delivers on your account (e.g. whether rate_limits.five_hour.resets_at is populated). No manual settings.json edits.

From source (same commands, prefix with node bin/cah.js):

node bin/cah.js install
node bin/cah.js install --templates ./templates  # dev: load from disk instead of embedded
node bin/cah.js list --json

Ownership and safety

Every file cah writes carries one of three HTML-comment sentinels buried at the end of the file:

<!-- cah-model-command:v1 -->
<!-- cah-model-agent:v1 -->
<!-- cah-skill:v1 -->

A file under .claude/{commands,agents,skills}/ is recognised as ours if it contains any of these. Files without a recognised marker are foreign — cah never overwrites or deletes them, only logs a warning.

Orphan sweep

When a {model, effort} pair or a skill is dropped from lib/manifest.js, the previously installed file would otherwise sit forever in ~/.claude/. To prevent that, cah install finishes each class with a prune step: any file (or skill directory) that carries our sentinel but is no longer in the manifest is deleted, and the count is reported on a pruned N (orphan) tail. Foreign files are never touched by the prune step.

Migration from crush claude-init

Per-model commands and agents used to ship inside the crush fork under the older crush-* sentinels:

<!-- crush-model-command:v1 -->
<!-- crush-model-agent:v1 -->

cah recognises both families as "ours" and migrates legacy files on the next cah install (overwritten and re-stamped with the new sentinel). cah uninstall removes either family.

The legacy <!-- crush-slash-command:v1 --> marker (the /crush slash-command body) is intentionally not in this set — cah neither installs nor removes /crush. That's still owned by the crush fork's claude-init command.

Layout

cc-arch-hands/
├── bin/cah.js                   # CLI entry point (#!/usr/bin/env node)
├── bin/cah-checkpoint-hint.js   # Stop-hook bin: emits the 90% [hint] (#!/usr/bin/env node)
├── bin/cah-status.js            # statusLine bin: model · ctx% + 5h/wk on Pro/Max (#!/usr/bin/env node)
├── bin/cah-stamp.js             # Stop+PostToolUse bin: chat audit-trail line (#!/usr/bin/env node)
├── bin/cah-status-probe.js      # diagnostic statusLine bin used by `cah probe statusline`
├── lib/
│   ├── cli.js                   # dispatch, arg parsing (node:util parseArgs), --only resolver
│   ├── manifest.js              # AllModelCommands (36 entries), AllSkills (10), SkillDeps
│   ├── sentinel.js              # new + legacy markers, ownership classifier
│   ├── scope.js                 # global vs local target dir resolution
│   ├── templates.js             # bundled / disk template abstraction
│   ├── fsutil.js                # readFileMaybe + orphan-prune helpers
│   ├── transcript-stats.js      # shared: stats, formatStatusLine, makeBar, reset formatters
│   ├── commands.js              # render + install + remove (35 .md files)
│   ├── agents.js                # render + install + remove (35 .md files)
│   ├── skills.js                # mirror templates/skills/<n>/ tree, optional subset
│   ├── binstall.js              # copy companion bins into ~/.claude/cah-bin/ (// cah-bin:v1)
│   └── probe.js                 # enable/disable cah-status-probe via settings.json edits
├── templates/
│   └── skills/                  # repo-sight, task, babygoal, babysit,
│       └── <name>/SKILL.md      # checkpoint, resume, checkpoint-prune, triage,
│                                # checkpoint-watch, clock
├── test/
│   ├── installer.test.js        # installer tests (node:test + node:assert)
│   ├── cli.test.js              # CLI layer tests (scope, parseOnly, resolveDeps, --only subset)
│   ├── binstall.test.js         # bin-copy / prune / sentinel / resolveBinDir tests
│   ├── clock.test.js            # cah-status bin tests
│   ├── stamp.test.js            # cah-stamp bin tests (incl. throttle, rate_limits cache)
│   ├── transcript-stats.test.js # transcript-stats helper unit tests (incl. makeBar)
│   ├── checkpoint-hint.test.js  # cah-checkpoint-hint bin tests
│   └── probe.test.js            # lib/probe.js enable/disable/readLog tests
├── .github/workflows/ci.yml    # CI: npm test on 3 OS × 3 Node versions
├── install.sh / install.bat     # quick install wrappers
├── reinstall.sh / reinstall.bat # uninstall + install
├── uninstall.sh / uninstall.bat # quick uninstall wrappers
├── LICENSE-MIT                  # MIT license
├── LICENSE-APACHE               # Apache 2.0 license
└── package.json

The 35 per-model command/agent bodies are rendered parametrically at install time from AllModelCommands, not stored as 70 nearly-identical files. Adding a new {model, effort} pair = one object in lib/manifest.js.

Skills are static directory trees, mirrored verbatim, so authoring a new skill = drop a directory under templates/skills/ and append its name to AllSkills.

Development

# Edit a template without rebuilding:
node bin/cah.js install --templates ./templates --only skills --cwd /tmp/sandbox

# Run the test suite:
npm test

License

Dual-licensed under MIT or Apache 2.0, at your option.