retro

A weekly report that reviews a software project’s commit history, work patterns, and code quality, while keeping past reports to show trends. It also separates contributions by team member.

In plain words
What is it for?
Use it for weekly engineering retrospectives, reviewing recent releases, examining contribution patterns, and extracting follow-up actions from the work.
Why use it?
It removes the manual work of piecing together what the team shipped and how the work went. It gives the team a record for recognizing contributions and identifying areas to improve.

Skill for Claude CodeCodex

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 skills/gcwing/bitfun/gstack-retro
Any agent
npx skills add GCWing/BitFun --skill gstack-retro
Clone the repo
git clone --depth 1 https://github.com/GCWing/BitFun

Made for: Claude Code, Codex.

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 9,885 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 $0.00076 $0.09885
Opus 5 $0.00038 $0.04942
Sonnet 5 $0.00015 $0.01977
Haiku 4.5 $0.00008 $0.00988

Measured yesterday against content hash 0a290ccf2965, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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:

  • retro — 86% identical, 296 lines differ
src/crates/assembly/core/builtin_skills/gstack-retro/SKILL.md · 865 lines

How it starts

The opening of the file, as written. The whole thing — 865 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/retro — Weekly Engineering Retrospective

Generates a comprehensive engineering retrospective analyzing commit history, work patterns, and code quality metrics. Team-aware: identifies the user running the command, then analyzes every contributor with per-person praise and growth opportunities. Designed for a senior IC/CTO-level builder using BitFun as a force multiplier.

BitFun Team Mode Dispatch

When this skill is invoked by BitFun Team Mode, this skill supplies the retrospective methodology. Use existing Task sub-agents for independent read-only analysis tracks, then keep the final retro narrative in the main Team session.

  • Do not assume a Retro sub-agent exists. Choose only from the Task tool's available agents.
  • Prefer matching custom analytics/docs sub-agents if available; otherwise use Explore for repository history/work-pattern analysis and FileFinder for related reports or release notes.
  • Good parallel Task tracks: commit/theme analysis, quality-risk patterns, docs/release trace, and follow-up action extraction.
  • Do not ask Task sub-agents to edit files. The main Team orchestrator synthesizes the retro and action items.

User-invocable

When the user types /retro, run this skill.

Arguments

  • /retro — default: last 7 days
  • /retro 24h — last 24 hours
  • /retro 14d — last 14 days
  • /retro 30d — last 30 days
  • /retro compare — compare current window vs prior same-length window
  • /retro compare 14d — compare with explicit window
  • /retro global — cross-project retro across all AI coding tools (7d default)
  • /retro global 14d — cross-project retro with explicit window

Instructions

Parse the argument to determine the time window. Default to 7 days if no argument given. All times should be reported in the user's local timezone (use the system default — do NOT set TZ).

Midnight-aligned windows: For day (d) and week (w) units, compute an absolute start date at local midnight, not a relative string. For example, if today is 2026-03-18 and the window is 7 days: the start date is 2026-03-11. Use --since="2026-03-11T00:00:00" for git log queries — the explicit T00:00:00 suffix ensures git starts from midnight. Without it, git uses the current wall-clock time (e.g., --since="2026-03-11" at 11pm means 11pm, not midnight). For week units, multiply by 7 to get days (e.g., 2w = 14 days back). For hour (h) units, use --since="N hours ago" since midnight alignment does not apply to sub-day windows.

Read the full file on GitHub · 865 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. yesterday First seen · 865 lines · 76 tokens per session scan A 0a290ccf2965

Subscribe to this mod's changes

retro is a skill published in the GitHub repository GCWing/BitFun (1,871 stars, last pushed yesterday), licensed MIT. It adds 76 tokens to every session and 9,885 once invoked, about $0.0004 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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