testdino-mcp: Skill for Claude Code

.claude/skills/retro/SKILL.md

retro is a skill for Claude Code from testdino-hq/testdino-mcp. It costs 19 tokens per session (725 once invoked), scanned A, original, MIT.

A post-task review that records what worked, what failed, and reusable lessons in the project's automatic memory.

In plain words
What is it for?
Use it after significant tasks to inspect the changes, classify the outcome, save lessons when needed, and check whether a lesson should be promoted to a broader rule.
Why use it?
It helps future work avoid repeated mistakes, especially after corrections, rework, or a non-trivial change.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md.

This is testdino-hq/testdino-mcp's own configuration. It tells Claude Code how to work on testdino-mcp 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 testdino-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to testdino-hq/testdino-mcp. 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/testdino-hq/testdino-mcp/main/.claude/skills/retro/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/testdino-hq/testdino-mcp

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 retro

README.md
[![agentmods](https://agentmods.dev/badge/skills/testdino-hq/testdino-mcp/retro/github.svg)](https://agentmods.dev/skills/testdino-hq/testdino-mcp/retro)
Your own site
<a href="https://agentmods.dev/skills/testdino-hq/testdino-mcp/retro"><img src="https://agentmods.dev/badge/skills/testdino-hq/testdino-mcp/retro/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 retro

Your own site · 80×15
<a href="https://agentmods.dev/skills/testdino-hq/testdino-mcp/retro"><img src="https://agentmods.dev/badge/skills/testdino-hq/testdino-mcp/retro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 725 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 $0.00019 $0.00725
Opus 5 $0.00010 $0.00362
Sonnet 5 $0.00004 $0.00145
Haiku 4.5 $0.00002 $0.00072

Measured 11d ago against content hash 7768b4e5aadd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

retro 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 11d 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.

.claude/skills/retro/SKILL.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Run a retrospective on the work just completed.

When to Use

  • After completing a non-trivial task (new tool, bug fix, refactor)
  • After a task that required rework or user corrections
  • After the self-correction protocol fired
  • When the user explicitly asks

Workflow

1. Review What Happened

  • Check git diff for what changed
  • Scan conversation for user corrections, stops, or direction changes
  • Count: how many times was the approach adjusted?

2. Categorize

Outcome Meaning
Clean Worked first time, no rework
Corrected User stepped in with a correction
Reworked Had to redo — approach was wrong

3. Write Lessons (for Corrected/Reworked only)

Write to auto-memory (feedback type) with:

  • name: Short descriptive title
  • description: One-line summary for future relevance matching
  • Content:
    • Trigger: What happened
    • Wrong: What I did and why it was wrong
    • Right: What should have been done instead
    • Rule: The general principle (one sentence, reusable)
    • Area: Which part of the project this applies to (tools, endpoints, docs, publishing, or "all")

4. Check for Promotions

Review existing auto-memory feedback entries. If the same lesson pattern appears 3+ times:

  1. Propose adding as a permanent rule to the Known Patterns & Pitfalls table in CLAUDE.md
  2. Get user approval before modifying CLAUDE.md
  3. Once promoted, note the promotion in the auto-memory entry

5. Check if Skills Need Updates

If a lesson reveals a gap in a skill workflow (e.g., /add-tool missed a step, /verify should check something extra):

  1. Identify which skill file needs updating
  2. Propose the specific change
  3. Get user approval before modifying

Output Format

## Retrospective

**Task:** [what was done]
**Outcome:** Clean / Corrected / Reworked
**Adjustments:** [N times the approach was changed]

### Lessons Learned
[If Corrected/Reworked — list each lesson with the rule]

### Promotions
[If any feedback pattern hit 3+ occurrences — propose CLAUDE.md update]

### Skill Updates
[If any skill workflow gap was identified — propose the fix]

Read the full file on GitHub · 94 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. 11d ago First seen · 94 lines · 19 tokens per session scan A 7768b4e5aadd

Subscribe to this mod's changes

retro is a skill published in the GitHub repository testdino-hq/testdino-mcp (9 stars, last pushed 1mo ago), licensed MIT. It adds 19 tokens to every session and 725 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 2026-08-31.

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