Tom Boucher 4e7e83bf58 fix(3587)(security): argv-based subprocess for check.ship-ready
`gsd-sdk query check.ship-ready <phase>` built a git command as a shell
string with the current branch name interpolated. Git branch names can
legally contain shell metacharacters, so a repo checked out on a
malicious branch like `foo;touch${IFS}INJ;bar` executed arbitrary shell
commands.

Vulnerability site (pre-fix):

  sdk/src/query/check-ship-ready.ts:50
    runSyncSafe(`git config --get branch.${current_branch}.merge`, cwd)
  → execSync('git config --get branch.foo;touch${IFS}INJ;bar.merge')
  → /bin/sh -c parses three commands; the middle one runs `touch INJ`
    in the project dir and creates the sentinel file.

Manually reproduced on git 2.53.0:
  - refname `foo;touch${IFS}INJ;bar` is accepted by `git check-ref-format`
    and by `git checkout -b`.
  - `current_branch` returned from `git rev-parse --abbrev-ref HEAD`
    contains the metacharacters verbatim.
  - Interpolation into the buggy execSync call creates the sentinel.

Fix:

- Replace `runSyncSafe(cmd: string, cwd)` (execSync, shell-string) with
  `runArgvSafe(file, args: readonly string[], cwd)` (execFileSync,
  argv-based, no shell).
- Same shape for the boolean wrapper: `boolArgvSafe`.
- Convert all 7 subprocess sites in the module to argv form:
  - `git status --porcelain`
  - `git rev-parse --abbrev-ref HEAD`
  - `git config --get branch.<name>.merge`   ← the interpolation site
  - `git rev-parse --verify main`
  - `git remote`
  - `gh --version`
  - `which gh`
- Shell is never invoked. Branch names — even ones with `;`, `$IFS`,
  backticks, `$()` — are passed as a single argv element and treated
  as opaque data.

Regression test (`sdk/src/query/check-ship-ready.test.ts`):

- `#3587: branch name with shell-injection payload does not execute
  injected command` — creates a real git repo, checks out the proven
  exploit branch `foo;touch${IFS}INJECTED_BY_3587;bar`, runs
  checkShipReady, and asserts the sentinel file does NOT exist. This
  test FAILS on the unfixed code (verified pre-implementation) and
  PASSES on the fixed code — true red→green TDD.
- `#3587: round-trips a metacharacter branch name verbatim in
  current_branch` — positive proof the branch name survives argv as
  data (would fail if a future change re-introduces shell quoting).
- `#3587: gh probe does not invoke a shell` — locks the gh path
  against a future regression that might add an interpolation site.

Validation:
- SDK unit suite via vitest: 1,869/1,869 pass.
- Full root suite via gsd-test-both (per CLAUDE.md): 10,676/10,676
  on Mac AND 10,676/10,676 on Linux Docker, zero cross-platform diff.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-15 20:42:52 -04:00

GET SHIT DONE

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A light-weight meta-prompting, context engineering, and spec-driven development system for Claude Code, OpenCode, Gemini CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more.

Solves context rot — the quality degradation that happens as your AI fills its context window.

npm version npm downloads Tests Discord X (Twitter) $GSD Token GitHub stars License


npx get-shit-done-cc@latest

Works on Mac, Windows, and Linux.


GSD Install


"If you know clearly what you want, this WILL build it for you. No bs."

"I've done SpecKit, OpenSpec and Taskmaster — this has produced the best results for me."

"By far the most powerful addition to my Claude Code. Nothing over-engineered. Literally just gets shit done."


Trusted by engineers at Amazon, Google, Shopify, and Webflow.


Important

Returning to GSD?

Run /gsd-map-codebase to re-index your codebase, then /gsd-new-project to rebuild GSD's planning context. Your code is fine — GSD just needs its context rebuilt. See the CHANGELOG for what's new.


Why I Built This

I'm a solo developer. I don't write code — Claude Code does.

Other spec-driven tools exist, but they're all built for 50-person engineering orgs — sprint ceremonies, story points, stakeholder syncs, Jira workflows. I'm not that. I'm a creative person trying to build great things consistently.

So I built GSD. The complexity is in the system, not in your workflow. Behind the scenes: context engineering, XML prompt formatting, subagent orchestration, state management. What you see: a few commands that just work.

The system gives Claude everything it needs to do the work and verify it. I trust the workflow. It just does a good job.

— TÂCHES


How It Works

The loop is six commands. Each one does exactly one thing.

1. Initialize

/gsd-new-project

Questions → research → requirements → roadmap. You approve it, then you're ready to build.

Already have code? Run /gsd-map-codebase first. It analyzes your stack, architecture, and conventions so /gsd-new-project asks the right questions.

2. Discuss

/gsd-discuss-phase 1

Your roadmap has a sentence per phase. That's not enough to build it the way you imagine it. Discuss captures your decisions before anything gets planned: layouts, API shapes, error handling, data structures — whatever gray areas exist for this specific phase.

The output feeds directly into research and planning. Skip it, get reasonable defaults. Use it, get your vision.

3. Plan

/gsd-plan-phase 1

Research → plan → verify, in a loop until the plans pass. Each plan is small enough to execute in a fresh context window.

4. Execute

/gsd-execute-phase 1

Plans run in parallel waves. Each executor gets a fresh 200k-token context. Each task gets its own atomic commit. Walk away, come back to completed work with a clean git history.

Your main context window stays at 30–40%. The work happens in the subagents.

5. Verify

/gsd-verify-work 1

Walk through what was built. Anything broken gets a diagnosed fix plan — ready for immediate re-execution. You don't debug manually; you just run execute again.

6. Repeat → Ship

/gsd-ship 1
/gsd-complete-milestone
/gsd-new-milestone

Loop discuss → plan → execute → verify → ship until the milestone is done. Then archive, tag, and start the next one fresh.


Getting Started

npx get-shit-done-cc@latest

The installer prompts for your runtime (Claude Code, OpenCode, Gemini CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more) and whether to install globally or locally.

claude --dangerously-skip-permissions

GSD is built for frictionless automation. Skip-permissions is how it's intended to run.

Install only the skills you need with --profile=core (six core-loop skills), --profile=standard (core + phase management), or the default full install. Profiles compose: --profile=core,audit. --minimal is an alias for --profile=core. See docs/USER-GUIDE.md for the full walkthrough, non-interactive install flags for all 15 runtimes, and permissions configuration. See ADR-0011 for the profile model and runtime surface control.

Current release highlights are in docs/RELEASE-v1.42.1.md: package legitimacy checks, safer installer migrations, runtime surface control, custom ship PR sections, reviewer defaults, fallow structural review, and quota-aware execution recovery.


Commands

The main loop:

Command What it does
/gsd-new-project Questions → research → requirements → roadmap
/gsd-discuss-phase [N] Capture implementation decisions before planning
/gsd-plan-phase [N] Research + plan + verify
/gsd-execute-phase <N> Execute plans in parallel waves
/gsd-verify-work [N] Manual acceptance testing
/gsd-ship [N] Create PR from verified phase work
/gsd-progress --next Auto-detect and run the next step
/gsd-complete-milestone Archive milestone and tag release
/gsd-new-milestone Start next version
/gsd:surface Enable/disable skill clusters at runtime without reinstall

For ad-hoc tasks, autonomous mode, codebase analysis, forensics, and the full command surface — see docs/COMMANDS.md.


Why It Works

Three things most AI-coding setups get wrong:

1. Context bloat. As a session grows, quality degrades. GSD keeps your main context clean by doing the heavy work in fresh subagent contexts. Researchers, planners, and executors each start fresh with exactly what they need.

2. No shared memory. GSD maintains structured artifacts that survive session boundaries: PROJECT.md (vision), REQUIREMENTS.md (scope), ROADMAP.md (where you're going), STATE.md (current position and decisions), CONTEXT.md (per-phase implementation decisions). Every new session loads these and knows exactly where things stand.

3. No verification. Code that "runs" isn't code that "works." GSD's verify step walks you through what was built, diagnoses failures with dedicated debug agents, and generates fix plans before you declare a phase done.

See docs/ARCHITECTURE.md for how the multi-agent orchestration and context engineering work in detail.


Configuration

Settings live in .planning/config.json. Configure during /gsd-new-project or update with /gsd-settings.

Key dials:

Setting What it controls
mode interactive (confirm each step) or yolo (auto-approve)
Model profiles quality / balanced / budget — controls which model each agent uses
workflow.research / plan_check / verifier Toggle the quality agents that add tokens and time
parallelization.enabled Run independent plans simultaneously

Optional structural review: set code_quality.fallow.enabled to true to add a fallow pre-pass to /gsd-code-review. GSD writes .planning/phases/<phase>/FALLOW.json and surfaces a Structural Findings (fallow) section in REVIEW.md. Install with npm install -D fallow@^2.70.0 (or system-wide via cargo install fallow; note that the Rust binary's JSON schema must match the documented v2.70+ contract — older versions may produce silent zero-finding output).

Package legitimacy checks are built into the research, planning, and execution path: recommended dependencies get audited, unverified packages require a human checkpoint, and failed installs stop instead of trying similarly named alternatives.

For the full configuration reference — all settings, git branching strategies, per-runtime model overrides, workstream config inheritance, agent skills injection — see docs/CONFIGURATION.md.


Documentation

Doc What's in it
User Guide End-to-end walkthrough, install options, all runtime flags, configuration reference
Commands Every command with flags and examples
Configuration Full config schema, model profiles, git branching
Architecture How the multi-agent orchestration works
CLI Tools gsd-sdk query and programmatic SDK dispatch seams
Features Complete feature index
Changelog What changed in each release

Troubleshooting

Commands not showing up? Restart your runtime after install. GSD installs to ~/.claude/skills/gsd-*/ (Claude Code), ~/.codex/skills/gsd-*/ (Codex), or the equivalent for your runtime.

Codex users — minimum supported CLI version is 0.130.0. Codex CLI 0.130.0 (release notes) removed extra-skill-roots discovery via openai/codex#21485; from that version onward Codex discovers skills from standard roots (including ~/.codex/skills/<name>/SKILL.md). GSD installs there directly. Earlier Codex CLI versions may still discover additional roots, which can surface duplicate gsd-* entries (one from extra-roots discovery, one from ~/.codex/skills/); restart Codex after install and either upgrade or accept the duplicate listing.

Something broken? Re-run the installer — it's idempotent:

npx get-shit-done-cc@latest

Containers or Docker? Set CLAUDE_CONFIG_DIR before installing to avoid tilde-expansion issues:

CLAUDE_CONFIG_DIR=/home/youruser/.claude npx get-shit-done-cc --global

Full troubleshooting and uninstall instructions in docs/USER-GUIDE.md.


Community

Project Platform
gsd-opencode Original OpenCode port
Discord Community support

Star History

Star History Chart

License

MIT License. See LICENSE for details.


Claude Code is powerful. GSD makes it reliable.

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