tachi: Skill for Claude Code

.claude/skills/~aod-project-plan/SKILL.md

~aod-project-plan is a skill for Claude Code from davidmatousek/tachi. It costs 59 tokens per session (1,850 once invoked), scanned A, original, Apache-2.0.

An architecture-plan checker that reviews plan.md for the technology stack, project structure, data storage, APIs, security design, testing approach, and consistency with the feature specification. An architecture plan explains how a feature will be built.

In plain words
What is it for?
It is for validating languages, frameworks, databases, infrastructure, data models, API details, security choices, testing, and project organisation.
Why use it?
It catches missing technical decisions and disagreements between the requested feature and the proposed implementation before coding starts.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md; names the TodoWrite tool.

This is davidmatousek/tachi's own configuration. It tells Claude Code how to work on tachi itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything tachi configures →

Reuse

Borrowing it

Nothing to install: this file belongs to davidmatousek/tachi. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/davidmatousek/tachi/main/.claude/skills/~aod-project-plan/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/davidmatousek/tachi

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 ~aod-project-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/davidmatousek/tachi/aod-project-plan.svg)](https://agentmods.dev/skills/davidmatousek/tachi/aod-project-plan)
Your own site
<a href="https://agentmods.dev/skills/davidmatousek/tachi/aod-project-plan"><img src="https://agentmods.dev/badge/skills/davidmatousek/tachi/aod-project-plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,850 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00059 $0.01850
Opus 5 $0.00030 $0.00925
Sonnet 5 $0.00012 $0.00370
Haiku 4.5 $0.00006 $0.00185

Measured 4d ago against content hash d042b8f306cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

~aod-project-plan 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/~aod-project-plan/SKILL.md · 263 lines

How it starts

The opening of the file, as written. The whole thing — 263 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architecture Validator Skill

Purpose

Automatically validates architecture documentation (plan.md) for completeness, technical rigor, and alignment with feature specifications. Implements FR-006 from the feature specification.

How It Works

Step 1: Locate Architecture Plan

  • Search for specs/*/plan.md files
  • If specific feature directory provided, validate that plan.md
  • Report if plan.md not found

Step 2: Validate Required Sections

Check for mandatory sections per AOD plan template:

Technical Context (Required)
  • Language/Version
  • Primary Dependencies
  • Storage solution
  • Testing approach
  • Target Platform
  • Project Type
  • Performance Goals
  • Constraints
  • Scale/Scope
Constitution Check (Required)
  • All 7 constitutional principles validated
  • Evidence for each principle
  • Violations justified (if any)
Project Structure (Required)
  • Documentation structure
  • Source code structure
  • File organization
Technology Stack (Required)
  • Languages and versions
  • Frameworks and libraries
  • Database and storage
  • Infrastructure components

Step 3: Check Technical Decisions

Verify technical decisions are documented:

  • data-model.md: Entity definitions and relationships
  • contracts/: API specifications (if applicable)
  • research.md: Technical unknowns resolved

Step 4: Validate Spec Alignment

  • Compare plan.md with spec.md
  • Check all functional requirements addressed
  • Verify success criteria have implementation strategy
  • Ensure out-of-scope items respected

Step 5: Security Architecture Check

Verify security considerations documented:

  • Authentication approach
  • Authorization model
  • Data protection strategy
  • API security measures
  • Secrets management

Step 6: Generate Validation Report

✅ Architecture Validation Report

File: specs/{feature-id}/plan.md

Required Sections:
- [✓/✗] Technical Context
- [✓/✗] Constitution Check (7/7 principles)
- [✓/✗] Project Structure
- [✓/✗] Technology Stack

Design Artifacts:
- [✓/✗] data-model.md (entities defined)
- [✓/✗] contracts/ (API specs)
- [✓/✗] research.md (decisions documented)

Quality Checks:
- [✓/✗] All FRs from spec.md addressed
- [✓/✗] Security architecture documented
- [✓/✗] Performance targets specified
- [✓/✗] Complexity justified

Status: READY / NOT READY

Issues Found:
1. [Issue description]
2. [Issue description]

Recommendations:
- [Specific action to resolve each issue]

Read the full file on GitHub · 263 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 · 263 lines · 59 tokens per session scan A d042b8f306cf

Subscribe to this mod's changes

~aod-project-plan is a skill published in the GitHub repository davidmatousek/tachi (90 stars, last pushed 26d ago), licensed Apache-2.0. It adds 59 tokens to every session and 1,850 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 2026-09-03.

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