ag-thinkback

ag-thinkback is a skill for Claude Code from andregusman-raiz/a-gusman-claude. It costs 47 tokens per session (1,105 once invoked), scanned A, original, MIT.

A tool that reviews decisions made during a coding session and documents how those decisions were reached. It can analyze the session, a file, or a specific decision.

In plain words
What is it for?
Use it to review recent Git history, code changes, retrospectives, alternatives, and decision points during or after a project.
Why use it?
It helps explain why a particular approach was chosen and can reveal where earlier reasoning led to a poor result.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions subagents.

Good fit Use it to review recent Git history, code changes, retrospectives, alternatives, and decision points during or after a project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/andregusman-raiz/a-gusman-claude/ag-thinkback
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.

Any agent
npx skills add andregusman-raiz/a-gusman-claude --skill ag-thinkback
Clone the repo
git clone --depth 1 https://github.com/andregusman-raiz/a-gusman-claude

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 ag-thinkback

README.md
[![agentmods](https://agentmods.dev/badge/skills/andregusman-raiz/a-gusman-claude/ag-thinkback/github.svg)](https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/ag-thinkback)
Your own site
<a href="https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/ag-thinkback"><img src="https://agentmods.dev/badge/skills/andregusman-raiz/a-gusman-claude/ag-thinkback/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 ag-thinkback

Your own site · 80×15
<a href="https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/ag-thinkback"><img src="https://agentmods.dev/badge/skills/andregusman-raiz/a-gusman-claude/ag-thinkback.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,105 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 warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 4
    Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.
    Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
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 $0.00047 $0.01105
Opus 5 $0.00023 $0.00553
Sonnet 5 $0.00009 $0.00221
Haiku 4.5 $0.00005 $0.00111

Measured 9d ago against content hash fafdc5246278, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ag-thinkback 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.

skills/ag-thinkback/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ag-thinkback — Decision Replay & Learning

Spawn the ag-thinkback agent to analyze and document the reasoning chain of past decisions.

Diferenca vs ag-retrospectiva

ag-retrospectiva ag-thinkback
Foco Metricas e resultados Cadeia de decisoes
Pergunta "O que aconteceu?" "POR QUE decidimos X?"
Output Report numerico Decision log com alternativas
Uso Fim de sessao Qualquer momento (analise pontual)

Invocation

Use the Agent tool with:

  • subagent_type: general-purpose
  • model: sonnet
  • mode: auto
  • run_in_background: true
  • prompt: Compose from template below + $ARGUMENTS

Prompt Template

Projeto: [CWD]
Modo: [--session | --file path | --decision 'descricao']

Voce e o agente de thinkback — replay e analise de decisoes.

## O que Analisar

### Para --session (sessao atual)
Reconstruir a cadeia de decisoes da sessao:

1. **Ler git log recente** para entender o que foi feito:
```bash
git log --oneline -30 --format="%h %s" --reverse
  1. Ler diffs para entender O QUE mudou:
git log --oneline -10 --stat
  1. Ler retrospectivas se existirem:
ls docs/ai-state/retrospectiva-*.md
  1. Para cada decisao significativa encontrada, documentar:

Para --file (arquivo especifico)

Analisar a historia de decisoes sobre um arquivo:

git log --follow --oneline [arquivo]
git log --follow -p [arquivo] | head -200

Para --decision (decisao especifica)

Buscar evidencias da decisao no codebase e git history.

Framework de Analise (por decisao)

### Decisao: [titulo]

**Contexto**: O que estava acontecendo quando a decisao foi tomada?

**Opcoes consideradas**:
1. [opcao escolhida] — escolhida porque [razao]
2. [alternativa A] — rejeitada porque [razao]
3. [alternativa B] — nao considerada (deveria ter sido?)

**Resultado**: [positivo | negativo | neutro]
- Se positivo: o que validou a escolha?
- Se negativo: onde a logica falhou?
- Se neutro: faltou informacao na hora?

Read the full file on GitHub · 147 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. 9d ago First seen · 147 lines · 47 tokens per session scan A fafdc5246278

Subscribe to this mod's changes

ag-thinkback is a skill published in the GitHub repository andregusman-raiz/a-gusman-claude (19 stars, last pushed 4d ago), licensed MIT. It adds 47 tokens to every session and 1,105 once invoked, about $0.0002 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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