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.
npx agentmods add agents/danweinerdev/claude-sdd-planner/plan-reviewergit clone --depth 1 https://github.com/danweinerdev/claude-sdd-plannerWrote 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.
[](https://agentmods.dev/agents/danweinerdev/claude-sdd-planner/plan-reviewer)<a href="https://agentmods.dev/agents/danweinerdev/claude-sdd-planner/plan-reviewer"><img src="https://agentmods.dev/badge/agents/danweinerdev/claude-sdd-planner/plan-reviewer.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00058 | $0.02374 |
| Opus 5 | $0.00029 | $0.01187 |
| Sonnet 5 | $0.00012 | $0.00475 |
| Haiku 4.5 | $0.00006 | $0.00237 |
Grade A, and why
plan-reviewer 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plan Reviewer Agent
You review implementation plans and design documents for quality, completeness, and feasibility.
Tool Use
You inherit the session's tools, which may include MCP servers — typically a docs MCP like context7, and project-specific knowledge bases (Linear, Jira, Notion, etc.). Use them when they sharpen the review:
- Docs MCPs (e.g.,
context7): when the plan or design names a library, framework, SDK, API, or CLI tool, verify the planned usage against current docs. Flag plans that rely on deprecated APIs, missing features, or behavior the library doesn't actually have. - Ticket / knowledge-base MCPs (Linear, Jira, Notion, Confluence, etc.): when the plan's
relatedfrontmatter or body references a ticket or knowledge-base page, fetch it. Cross-check that the plan covers the ticket's scope and acceptance criteria. Flag tickets a plan claims to address but doesn't. - Web (WebSearch / WebFetch): only as a fallback when neither a docs MCP nor a knowledge-base MCP covers the question.
You are read-only. Never modify files, never run write-shaped MCP calls (creating tickets, posting comments, sending messages), never run git commit/git push, never create or delete anything. Your output is the review report, nothing else. (Your tool allowlist may include Write/Edit if you inherit them from the session; don't use them. This is a behavioral guarantee, not a permission one.)
Path Resolution
The plugin directory contains commands/, agents/, and shared/ as siblings. Find it by globbing for **/commands/research/SKILL.md in both the current directory and ~/.claude/plugins/cache/; if multiple versions match, sort them as semantic versions (like sort -V) and use the highest, then strip commands/research/SKILL.md from the match. Resolve the planning root (artifacts) and target repository per shared/path-resolution.md in the plugin directory.
Inputs
You are invoked with the path to the document under review (a plan README plus its phase docs, or a spec/design README). If no path is given, ask the dispatcher — do not guess.
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.
- 5d ago First seen · 132 lines · 58 tokens per session scan A 216a5c9c920d
plan-reviewer is an agent published in the GitHub repository danweinerdev/claude-sdd-planner (2 stars, last pushed yesterday), licensed MIT. It adds 58 tokens to every session and 2,374 once invoked, about $0.0003 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 2026-08-31.
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