ghm-self-install: Workflow Automation for AI Agents | OpenAgentSkill

Overview

Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo. Runs an interactive wizard that seeds the framework (.claude/ hooks, skills, agents, rules, scripts) without clobbering product content. Triggers on "install the methodology", "adopt this into my repo", "self-install", "set up PRD lifecycle here", "onboard existing project". Outputs an installed framework + a verification report.

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Self-Install

Install the methodology into a target repo from the install manifest, the way Xantham's blueprint installs from markdown: the agent runtime is the installer, so the whole thing runs inside your Claude Code subscription — no API key, no metered calls, no service to stand up.

Two paths, one manifest. This skill is the interactive path. install.sh is the deterministic CLI path. Both read .claude/install-manifest.yaml, so they can't drift. Prefer driving install.sh from this skill; fall back to manual copies only when the script isn't reachable.

Consumes

.claude/install-manifest.yaml — authoritative framework / template_seed / never_touch lists (the keystone; never hardcode file lists).
install.sh — the deterministic installer this skill normally drives.
Safety rules from ghm-template-sync Phase "Safety Rules" — never overwrite MEMORY.md, SoT/*, PRD.md, README.md content.

Produces

An installed framework in the target repo (no new SoT IDs — this skill places the engine, it doesn't author specs).
A verification report (hooks emit valid JSON; readiness.py runs).

Workflow

Phase 1 — Preflight & mode detect

Confirm git, python3, awk are present; warn if the target isn't a git repo.
Detect mode: greenfield (no .claude/) vs brownfield (existing .claude/). Brownfield means merge, never overwrite product.
State the trade explicitly: this installs files only — it costs subscription tokens for the wizard turn, zero API.

Phase 2 — Wizard questions

Ask only what changes the outcome (honor the execution mode's budget):

Target directory (default: current repo).
Domain profile: product (default) · library · infrastructure · research.
Subset [standard+]: keep all 4 agents + all skills (default), or trim to a role subset. Quick mode skips this and installs everything.

Phase 3 — Install (drive `install.sh`)

Run the deterministic installer so behavior matches the CLI path exactly:

bash install.sh --target <DIR> --profile <PROFILE>        # add --dry-run to preview

Show the --dry-run plan first [standard+], then execute.
If a framework file shows drift, surface the diff and only re-run with --force after the user confirms (mirrors ghm-template-sync "show diff before destructive").
Never write anything in the manifest's never_touch list.

Phase 4 — Verify (trust-but-verify, the Xantham `verify-blueprint.sh` analog)

Run each .claude/hooks/*.sh in the target; assert valid JSON on stdout.
Run python scripts/readiness.py run — a non-zero exit on an empty scaffold is the expected BLOCK gate (no content yet), not a failure. Report the score.
Print next steps: customize README.md + PRD.md, then "Let's frame the problem".

Anti-patterns

Pattern	Fix
Hardcoding the file list in the skill	Read `.claude/install-manifest.yaml`
Overwriting a brownfield repo's `PRD.md`/`SoT`	Honor `never_touch`; seed templates once
Treating readiness BLOCK on a fresh scaffold as a bug	It's the gate working — report the score
Re-implementing copy logic instead of driving `install.sh`	One code path = no drift

View source ↗

File metadata

name: ghm-self-install
description: >
  Install the PRD-Driven Context Engineering methodology into a fresh OR existing
  repository — the subscription-native alternative to forking the whole repo. Runs an
  interactive wizard that seeds the framework (.claude/ hooks, skills, agents, rules,
  scripts) without clobbering product content. Triggers on "install the methodology",
  "adopt this into my repo", "self-install", "set up PRD lifecycle here", "onboard
  existing project". Outputs an installed framework + a verification report.
disable-model-invocation: true
context: fork
execution_modes:
  default: standard
  supports: [quick, standard, deep]
allowed-tools:
  - Read
  - Write
  - Edit
  - Glob
  - Grep
  - Bash

View original text

---
name: ghm-self-install
description: >
  Install the PRD-Driven Context Engineering methodology into a fresh OR existing
  repository — the subscription-native alternative to forking the whole repo. Runs an
  interactive wizard that seeds the framework (.claude/ hooks, skills, agents, rules,
  scripts) without clobbering product content. Triggers on "install the methodology",
  "adopt this into my repo", "self-install", "set up PRD lifecycle here", "onboard
  existing project". Outputs an installed framework + a verification report.
disable-model-invocation: true
context: fork
execution_modes:
  default: standard
  supports: [quick, standard, deep]
allowed-tools:
  - Read
  - Write
  - Edit
  - Glob
  - Grep
  - Bash
---

# Self-Install

Install the methodology into a target repo from the **install manifest**, the way
Xantham's blueprint installs from markdown: the agent runtime *is* the installer, so
the whole thing runs inside your Claude Code subscription — no API key, no metered
calls, no service to stand up.

> **Two paths, one manifest.** This skill is the interactive path. `install.sh` is the
> deterministic CLI path. Both read `.claude/install-manifest.yaml`, so they can't drift.
> Prefer driving `install.sh` from this skill; fall back to manual copies only when the
> script isn't reachable.

## Consumes

- `.claude/install-manifest.yaml` — authoritative `framework` / `template_seed` /
  `never_touch` lists (the keystone; never hardcode file lists).
- `install.sh` — the deterministic installer this skill normally drives.
- Safety rules from `ghm-template-sync` Phase "Safety Rules" — never overwrite
  `MEMORY.md`, `SoT/*`, `PRD.md`, `README.md` content.

## Produces

- An installed framework in the target repo (no new SoT IDs — this skill *places* the
  engine, it doesn't author specs).
- A verification report (hooks emit valid JSON; `readiness.py` runs).

## Workflow

### Phase 1 — Preflight & mode detect
1. Confirm `git`, `python3`, `awk` are present; warn if the target isn't a git repo.
2. Detect mode: **greenfield** (no `.claude/`) vs **brownfield** (existing `.claude/`).
   Brownfield means *merge, never overwrite product*.
3. State the trade explicitly: this installs files only — it costs subscription tokens
   for the wizard turn, **zero API**.

### Phase 2 — Wizard questions
Ask only what changes the outcome (honor the execution mode's budget):
- **Target directory** (default: current repo).
- **Domain profile**: `product` (default) · `library` · `infrastructure` · `research`.
- **Subset** `[standard+]`: keep all 4 agents + all skills (default), or trim to a role
  subset. Quick mode skips this and installs everything.

### Phase 3 — Install (drive `install.sh`)
Run the deterministic installer so behavior matches the CLI path exactly:
```bash
bash install.sh --target <DIR> --profile <PROFILE>        # add --dry-run to preview
```
- Show the `--dry-run` plan first `[standard+]`, then execute.
- If a framework file shows **drift**, surface the diff and only re-run with `--force`
  after the user confirms (mirrors `ghm-template-sync` "show diff before destructive").
- Never write anything in the manifest's `never_touch` list.

### Phase 4 — Verify (trust-but-verify, the Xantham `verify-blueprint.sh` analog)
1. Run each `.claude/hooks/*.sh` in the target; assert valid JSON on stdout.
2. Run `python scripts/readiness.py run` — a non-zero exit on an empty scaffold is the
   **expected BLOCK gate** (no content yet), not a failure. Report the score.
3. Print next steps: customize `README.md` + `PRD.md`, then "Let's frame the problem".

## Anti-patterns

| Pattern | Fix |
|---------|-----|
| Hardcoding the file list in the skill | Read `.claude/install-manifest.yaml` |
| Overwriting a brownfield repo's `PRD.md`/`SoT` | Honor `never_touch`; seed templates once |
| Treating readiness BLOCK on a fresh scaffold as a bug | It's the gate working — report the score |
| Re-implementing copy logic instead of driving `install.sh` | One code path = no drift |

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

Dependency or permission surface needs review
Permission surface may require sandboxing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution

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Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & trust

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

License: MIT
Version: 1.0.0
Last GitHub push: Aug 31, 2026
Registry updated: Sep 4, 2026
Instruction path: .claude/skills/ghm-self-install/SKILL.md @ 30ed1b07c994

Version reported in registry metadata; check source releases before relying on it.

Quality

69/100

Promising

Trust

65/100

Sandbox only

Audit

78/100

Needs review

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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Source: mattgierhart/PRD-driven-context-engineering
Indexed by: OpenAgentSkill community index

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