Agent skill

Ghm Self Install

by mattgierhart in mattgierhart/PRD-driven-context-engineering

Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo.

MITAuto-check: notesProduct & Project Management

Install Ghm Self Install

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/ghm-self-install .claude/skills/ghm-self-install && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .claude/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/ghm-self-install .agents/skills/ghm-self-install && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .agents/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/ghm-self-install .cursor/skills/ghm-self-install && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .cursor/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/mattgierhart/PRD-driven-context-engineering.git --path .claude/skills/ghm-self-install

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/ghm-self-install .gemini/skills/ghm-self-install && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .gemini/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/ghm-self-install .github/skills/ghm-self-install && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .github/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install mattgierhart/PRD-driven-context-engineering ghm-self-install --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mattgierhart/PRD-driven-context-engineering.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/ghm-self-install .opencode/skills/ghm-self-install && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "ghm-self-install" agent skill from https://github.com/mattgierhart/PRD-driven-context-engineering/tree/main/.claude/skills/ghm-self-install into .opencode/skills/ghm-self-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ghm-self-install", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: ghm-self-install
GitHub stars: 180
Token cost: ~1k tokens
SKILL.md length: 421 words
Files: 1
Skills in repo: 45
Repo updated: Aug 31, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo.

Works in 4 steps: Preflight & mode detect → Wizard questions → Install (drive install.sh) → …
Install the methodology
SKILL.md covers Consumes, Produces, Workflow and Anti-patterns
Calls bash and python

What it does

Ghm Self Install is an agent skill from mattgierhart/PRD-driven-context-engineering. 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.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Product & Project Management, covering PRD writing and Context engineering. The repository describes itself as: PRD-Led Context Engineering — Memory as Infrastructure. An ontology layer for product teams building products that solve real problems — with AI agents that remember. Gated PRD… The licence is MIT.

When your agent uses it

Install the methodology
Adopt this into my repo
Set up PRD lifecycle here
Onboard existing project

Example prompts

“install the methodology”
“adopt this into my repo”
“self-install”
“/ghm-self-install”

Requirements

Python 3
Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash

Workflow steps

4 steps, taken from the step headings in SKILL.md.

Preflight & mode detect
Wizard questions
Install (drive install.sh)
Verify (trust-but-verify, the Xantham verify-blueprint.sh analog)

What it can do on your machine

Read from SKILL.md and the folder at commit 30ed1b0. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Read
- Write
- Edit
- Glob
- Grep
- Bash
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- bash
- python
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Ghm Self Install loads about 1k tokens when it runs. Until then it costs about 126 tokens; SKILL.md has 421 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~126
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
```
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mattgierhart/PRD-driven-context-engineering at commit 30ed1b0, republished under its MIT licence (© mattgierhart). 421 words, ~1,008 tokens.

Download SKILL.mdSave it as .claude/skills/ghm-self-install/SKILL.md (or your agent's skills folder).

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.
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
disable-model-invocation: true
context: fork
execution_modes.default: standard
execution_modes.supports: quick, standard, deep

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.

Show full SKILL.md (165 more words)Show less

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)

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

Files

Just SKILL.md in .claude/skills/ghm-self-install of mattgierhart/PRD-driven-context-engineering.

Open the folder on GitHubat commit 30ed1b0

Compare with similar skills

Ghm Self Install next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Ghm Self Install compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Ghm Self Install this skillmattgierhart/PRD-driven-context-engineering	180	—	~1k	Automated safety check: Notes	MIT	1 mo ago
Sagawarpdotdev/common-skills	610	—	~4.1k	Automated safety check: Pass	MIT	yesterday
CCPM Project Managementautomazeio/ccpm	8.4k	—	~1.1k	Automated safety check: Pass	MIT	6 mo ago
Trellis Brainstormanjiemo/SunnyBeach	178	7 repos	~4k	Automated safety check: Pass	Apache-2.0	1 mo ago
Ouroboros PM InterviewQ00/ouroboros	6.2k	—	~5.7k	Automated safety check: Pass	MIT	3 days ago
Project Planneradrianpuiu/claude-skills-marketplace	100	1 repos	~6k	Automated safety check: Pass	None	4 mo ago

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Questions about Ghm Self Install

What does Ghm Self Install do?

Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo. Ghm Self Install is an agent skill from mattgierhart/PRD-driven-context-engineering. Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo.

When should I use Ghm Self Install?

Ghm Self Install fits situations like: install the methodology; adopt this into my repo; set up PRD lifecycle here; onboard existing project.

How do I install Ghm Self Install in Claude Code?

Run `npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a claude-code`. Or copy the skill folder (.claude/skills/ghm-self-install in mattgierhart/PRD-driven-context-engineering) into .claude/skills/ghm-self-install in your project. Claude Code loads it when a task matches its description.

How do I install Ghm Self Install in Codex?

Run `npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a codex`. Or copy the skill folder (.claude/skills/ghm-self-install in mattgierhart/PRD-driven-context-engineering) into .agents/skills/ghm-self-install in your project. Codex loads it when a task matches its description.

Can I use Ghm Self Install in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mattgierhart/PRD-driven-context-engineering --skill ghm-self-install -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ghm-self-install, .gemini/skills/ghm-self-install, .github/skills/ghm-self-install and .opencode/skills/ghm-self-install in your project.

What does Ghm Self Install need to run?

Going by SKILL.md and its folder, Ghm Self Install needs the command-line tools its instructions call (bash and python). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash.

Does Ghm Self Install access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Ghm Self Install safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Ghm Self Install use?

Ghm Self Install is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Ghm Self Install use?

About 1k tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Ghm Self Install?

Skills that share tags, products or a category with Ghm Self Install: Saga (warpdotdev/common-skills, 610 stars), CCPM Project Management (automazeio/ccpm, 8.4k stars), Trellis Brainstorm (anjiemo/SunnyBeach, 178 stars) and Ouroboros PM Interview (Q00/ouroboros, 6.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ghm Self Install?

mattgierhart (a GitHub user) maintains it in mattgierhart/PRD-driven-context-engineering, which has 180 GitHub stars. The repository holds 45 skills in this directory. The repository was last updated on August 31, 2026.

Source: mattgierhart/PRD-driven-context-engineering on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Ghm Self Install

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Self-Install

Consumes

Produces

Workflow

Phase 1 — Preflight & mode detect

Phase 2 — Wizard questions

Phase 3 — Install (drive install.sh)

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

Anti-patterns

Files

Compare with similar skills

Similar skills

More from mattgierhart/PRD-driven-context-engineering

Related

Questions about Ghm Self Install

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

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