PlanValidator

PlanValidator is an agent for coding agents from attilaszasz/sdd-pilot. It costs 26 tokens per session (1,062 once invoked), scanned A, original, MIT.

A reviewer that scores a feature implementation plan against defined phase-boundary rules and returns a structured pass or fail result. It checks requirement coverage, file ownership, declared dependencies, and other plan details.

In plain words
What is it for?
Use it to validate a plan against a specification, confirm that priority-one requirements are covered, check dependencies, and receive a structured verdict.
Why use it?
It catches incomplete or ambiguous plans before implementation begins. The result points to specific failing items and suggested fixes.

Agent

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.

agentmods
npx agentmods add agents/attilaszasz/sdd-pilot/_plan-validator
Clone the repo
git clone --depth 1 https://github.com/attilaszasz/sdd-pilot

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 PlanValidator

README.md
[![agentmods](https://agentmods.dev/badge/agents/attilaszasz/sdd-pilot/_plan-validator.svg)](https://agentmods.dev/agents/attilaszasz/sdd-pilot/_plan-validator)
Your own site
<a href="https://agentmods.dev/agents/attilaszasz/sdd-pilot/_plan-validator"><img src="https://agentmods.dev/badge/agents/attilaszasz/sdd-pilot/_plan-validator.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,062 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00026 $0.01062
Opus 5 $0.00013 $0.00531
Sonnet 5 $0.00005 $0.00212
Haiku 4.5 $0.00003 $0.00106

Measured 4d ago against content hash d8595a021f82, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

PlanValidator 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 4d 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.

.github/agents/_plan-validator.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Task

Evaluate plan.md against Plan → Tasks phase-boundary criteria.

Inputs

Plan path and spec path.

Execution Rules

Assess each criterion explicitly, avoid subjective scoring language, and keep issue statements terse. Run declared-dependency installability checks for real (read-only verdict on the result); never simulate a pass.

Output Format

Return pass/fail verdict, score, failing items, and recommended fixes.

  1. Run node scripts/parse-requirement-ownership.mjs "SpecPath" from the repository root. A parser failure makes P1 Requirement Coverage FAIL. Use its ordered p1RequirementIds as the live P1 set. Accept supplied P1RequirementIds only when it is an exact ordered match; otherwise discard it and use the live set. An empty supplied array is valid only when the successful live parser also returns an empty array. Never infer priority from proximity or treat parser ambiguity as no P1 requirements. Run evaluatePlanGate from scripts/phase-gates.mjs with the plan bytes and this live P1 set; its verdict is canonical for deterministic criteria below.
  2. Parse the ## Requirement Coverage Map from plan.md into rows of {reqID, components, filePaths, functions}.
  3. Parse the ## Architecture Decisions table into AD-### IDs and their referenced requirement/component scope.
  4. Parse ## Testing Strategy (or legacy ## QC Tooling) and ## Source Code sections for declared dependencies and package manifests.
  5. Evaluate each criterion as PASS or FAIL (quote specific issue if failing):

P1 Requirement Coverage

  • Every P1 requirement ID from spec.md appears as a row in the Requirement Coverage Map
  • Every P1 coverage-map row has a non-empty File Path(s) column
  • Every P1 coverage-map row has a non-empty Function(s)/Symbol(s) column
  • No P1 coverage-map row has a placeholder ([REPLACE: ...], TBD, as the sole value) in File Path(s) or Function(s)/Symbol(s)

Read the full file on GitHub · 74 lines

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. 4d ago First seen · 74 lines · 26 tokens per session scan A d8595a021f82

Subscribe to this mod's changes

PlanValidator is an agent published in the GitHub repository attilaszasz/sdd-pilot (95 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 1,062 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 2026-08-30.

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