gsd-plan-phase

gsd-plan-phase is a command for Claude Code from mrmyothet/zach-hair-studio. It costs 16 tokens per session (1,005 once invoked), scanned A, original, MIT.

A workflow for researching and writing a detailed plan for one project phase, then checking and revising that plan before work starts.

In plain words
What is it for?
Use it to research a phase, create PLAN.md, inspect existing research, and repeat plan checks until the plan passes or reaches its iteration limit.
Why use it?
It helps expose planning problems early, before they become implementation problems.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool.

Good fit Use it to research a phase, create PLAN.md, inspect existing research, and repeat plan checks until the plan passes or reaches its iteration limit.

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Install with agentmods
npx agentmods add commands/mrmyothet/zach-hair-studio/gsd-plan-phase
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/mrmyothet/zach-hair-studio

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for gsd-plan-phase

README.md
[![agentmods](https://agentmods.dev/badge/commands/mrmyothet/zach-hair-studio/gsd-plan-phase/github.svg)](https://agentmods.dev/commands/mrmyothet/zach-hair-studio/gsd-plan-phase)
Your own site
<a href="https://agentmods.dev/commands/mrmyothet/zach-hair-studio/gsd-plan-phase"><img src="https://agentmods.dev/badge/commands/mrmyothet/zach-hair-studio/gsd-plan-phase/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for gsd-plan-phase

Your own site · 80×15
<a href="https://agentmods.dev/commands/mrmyothet/zach-hair-studio/gsd-plan-phase"><img src="https://agentmods.dev/badge/commands/mrmyothet/zach-hair-studio/gsd-plan-phase.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,005 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00016 $0.01005
Opus 5 $0.00008 $0.00502
Sonnet 5 $0.00003 $0.00201
Haiku 4.5 $0.00002 $0.00101

Measured 9d ago against content hash d92b6e8c7338, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

gsd-plan-phase scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

landing-page/.claude/commands/gsd-plan-phase.md · 64 lines

What it actually says

Default flow: Research (if needed) → Plan → Verify → Done

Research-only mode (--research-phase <N>): Spawn gsd-phase-researcher for phase N, write RESEARCH.md, then exit before the planner runs. Useful for cross-phase research, doc review before committing to a planning approach, and correction-without-replanning loops where iterating on research alone is dramatically cheaper than re-spawning the planner. Replaces the deleted research-phase command (#3042).

Research-only modifiers:

  • No flag — when RESEARCH.md already exists, auto-uses it: emits a one-line notice and exits cleanly, no prompt.
  • --research — force-refresh: re-spawn the researcher unconditionally, no prompt. Bypasses the existing-RESEARCH.md auto-use path.
  • --view — view-only: print existing RESEARCH.md to stdout. Does not spawn the researcher. Cheapest mode for the correction-without-replanning loop. If no RESEARCH.md exists yet, errors with a hint to drop --view.

Orchestrator role: Parse arguments, validate phase, research domain (unless skipped), spawn gsd-planner, verify with gsd-plan-checker, iterate until pass or max iterations, present results.

<execution_context> @/home/myothet/repos/vct/zach-hair-studio/landing-page/.claude/gsd-core/workflows/plan-phase.md @/home/myothet/repos/vct/zach-hair-studio/landing-page/.claude/gsd-core/references/ui-brand.md </execution_context>

<runtime_note> Copilot (VS Code): Use vscode_askquestions wherever this workflow calls AskUserQuestion. They are equivalent — vscode_askquestions is the VS Code Copilot implementation of the same interactive question API. Do not skip questioning steps because AskUserQuestion appears unavailable; use vscode_askquestions instead. </runtime_note>

Flags:

  • --research — Force re-research even if RESEARCH.md exists
  • --skip-research — Skip research, go straight to planning
  • --gaps — Gap closure mode (reads VERIFICATION.md, skips research)
  • --skip-verify — Skip verification loop
  • --prd <file> — Use a PRD/acceptance criteria file instead of discuss-phase. Parses requirements into CONTEXT.md automatically. Skips discuss-phase entirely.
  • --ingest <path-or-glob> — Use one or more ADR files instead of discuss-phase. Parses locked decisions + scope fences into CONTEXT.md automatically. Skips discuss-phase entirely.
  • --ingest-format <auto|nygard|madr|narrative> — Optional ADR parser format override (auto default).
  • --reviews — Replan incorporating cross-AI review feedback from REVIEWS.md (produced by /gsd-review)
  • --text — Use plain-text numbered lists instead of TUI menus (required for /rc remote sessions)
  • --mvp — Vertical MVP mode. Planner organizes tasks as feature slices (UI→API→DB) instead of horizontal layers. On Phase 1 of a new project, also emits SKELETON.md (Walking Skeleton). Can be persisted on a phase via **Mode:** mvp in ROADMAP.md.

Normalize phase input in step 2 before any directory lookups.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 64 lines · 16 tokens per session scan A d92b6e8c7338

Subscribe to this mod's changes

gsd-plan-phase is a command published in the GitHub repository mrmyothet/zach-hair-studio (11 stars, last pushed 28d ago), licensed MIT. It adds 16 tokens to every session and 1,005 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.