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Agent skill

Catchup

by oliver-kriska in oliver-kriska/claude-elixir-phoenix

Summarize and review what changed while you were away. An agent skill from oliver-kriska/claude-elixir-phoenix.

MITAuto-check passedDevelopment

Install Catchup

skills CLI
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill catchup -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install oliver-kriska/claude-elixir-phoenix catchup --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/catchup/skills/catchup .claude/skills/catchup && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
catchup
GitHub stars
565
Token cost
~1.5k tokens
SKILL.md length
653 words
Files
5 (incl. references)
Skills in repo
111
Repo updated
First seen
Licence
MIT

At a glance

Summarize and review what changed while you were away. An agent skill from oliver-kriska/claude-elixir-phoenix.

  • Works in 5 steps: Parse arguments → Resolve the time window (here, in this… → Detect sources + pull MCP data (here) → …
  • Tasks that involve Commit messages
  • SKILL.md covers Usage, Iron Laws, Workflow and Sources at MVP, plus 1 more section
  • Calls git and gh

What it does

Catchup is an agent skill from oliver-kriska/claude-elixir-phoenix. Summarize and review what changed while you were away. Use after a weekend, vacation, or flight to check missed PRs, git commits, Linear tickets, and meetings — one prioritized brief, not a firehose.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/brief-format.md`, `references/config-schema.md` and `references/source-adapters.md`).

It sits in Development, covering Commit messages. The repository describes itself as: Claude Code plugin for Elixir/Phoenix/LiveView — 26 specialist agents, Iron Laws enforcement, and Tidewave MCP integration. Plan features with parallel research agents, execute… The licence is MIT.

When your agent uses it

  • Tasks that involve Commit messages

Example prompts

  • “/catchup”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Parse arguments
  2. Resolve the time window (here, in this context)
  3. Detect sources + pull MCP data (here)
  4. Delegate to catchup-runner (Sonnet)
  5. Present + stop

What it can do on your machine

Read from SKILL.md and the folder at commit 9767a82. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • git
    • gh

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git and gh, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Catchup loads about 1.5k tokens when it runs, and up to ~8.3k if it reads all its reference files. Until then it costs about 52 tokens; SKILL.md has 653 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~52
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~8.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from oliver-kriska/claude-elixir-phoenix at commit 9767a82, republished under its MIT licence (© oliver-kriska). 653 words, ~1,520 tokens.

Download SKILL.mdSave it as .claude/skills/catchup/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
catchup
description
Summarize and review what changed while you were away. Use after a weekend, vacation, or flight to check missed PRs, git commits, Linear tickets, and meetings — one prioritized brief, not a firehose.
effort
medium
disable-model-invocation
true
argument-hint
[--since "friday"|"2h"|"last-active"|"last-commit"] [--scope repo|all] [--sources github,git,linear,calendar] [--depth quick|standard|deep] [--focus…

Catchup — Async-Team Return Briefing

You've been away. This skill is a thin orchestrator: it resolves the window + sources here, then delegates the I/O fan-out, impact analysis, and brief assembly to the catchup-runner agent (Sonnet) so your (often Opus) session does not pay for summarization. You only print what the agent returns.

Usage

/catchup                                  # since you were last active
/catchup --since "friday"
/catchup --since "2h" --focus reviews-requested
/catchup --since last-commit --depth deep
/catchup --scope all                      # include cross-repo pings/reviews

Default is repo-scoped: every GitHub signal (reviews requested, notifications, mentions) is filtered to the repo you ran it in. Pass --scope all to also include cross-repo activity, which is then listed in its own separate section — never mixed into this repo's lists.

Iron Laws

  1. Delegate the heavy work — spawn catchup-runner (sonnet) for fan-out + assembly. Do NOT run the gh/git fan-out in this session; that defeats the cost/speed purpose.
  2. Resolve the window here, once — the agent must never re-resolve it. Pass absolute SINCE_* values.
  3. MCP runs here, not in the agent — Linear/Calendar MCP tools are unreliable in subagents. If present, fetch in this context and pass the text to the agent; else mark absent.
  4. Validate --since before any shell — match the grammar; on no match fall back to 24h and note the assumption.
  5. Stop after the brief — print the agent's summary, never auto-transition to another command.
  6. Repo-scoped by default — pass SCOPE=repo unless the user passed --scope all. A brief run inside one repo must not leak another repo's reviews/notifications. Cross-repo is opt-in only.

Workflow

1. Parse arguments

From $ARGUMENTS: --since, --scope, --sources, --depth, --focus. Defaults: --since last-active, --scope repo, all detected sources, --depth standard, no focus. --scope accepts repo (default — every GitHub signal filtered to the current repo) or all (cross-repo allowed, listed in its own section).

2. Resolve the time window (here, in this context)

Read ${CLAUDE_SKILL_DIR}/references/time-window.md. Resolve calendar words (friday, yesterday, a date) in the user's local timezone (this machine = the user's TZ), pivot through SINCE_EPOCH, derive SINCE_ISO (UTC) + SINCE_LABEL (with TZ abbrev) + LOCAL_TZ.

Default last-active = MAX of: newest Claude session mtime for this repo, your last own commit (git log --author=<you> -1 --format=%ct), your last own PR in this repo (gh pr list --repo <repo> --author @me --state all, repo-scoped — a global search would anchor to other repos). The latest footprint is "you were last here". Record which signal won. Variants: last-session (sessions only), last-commit/last-mine (your git/PR only). No signal → 24h, noted.

Show full SKILL.md (271 more words)Show less
3. Detect sources + pull MCP data (here)
gh:   command -v gh && gh auth status               → github ON
git:  git rev-parse --is-inside-work-tree           → git ON
linear/calendar: a Linear / Google-Calendar MCP tool present?

If Linear/Calendar MCP is present, query it in this context now (assigned/updated tickets since SINCE_ISO; missed + today's meetings in LOCAL_TZ) and keep the short text as LINEAR_DATA / CALENDAR_DATA. If absent, set them to absent (the agent will proxy-harvest XXX-#### refs for Linear; skip calendar with a note).

4. Delegate to catchup-runner (Sonnet)

Spawn one agent, foreground, passing a self-contained prompt:

Agent(subagent_type: "catchup-runner", prompt: """
SINCE_EPOCH={…}  SINCE_ISO={…Z}  SINCE_LABEL="{… local TZ}"
LOCAL_TZ={…}  SOURCES={github,git}  SCOPE={repo|all}  DEPTH={…}  FOCUS={…}
OUT_PATH={cwd}/.claude/catchup/brief-{YYYY-MM-DD}.md   # local date (date +%F), not UTC
LINEAR_DATA={text or "absent"}
CALENDAR_DATA={text or "absent"}
Window anchor signal: {which one won, for the Risks note}
Do the gh+git fan-out, impact analysis, and brief assembly per your
instructions. Write the file. Return ONLY the inline summary.
""")

The agent inlines all recipes (it cannot read this plugin's references). Do not re-implement its work here.

5. Present + stop

Print the agent's returned summary verbatim and the brief path.

If the agent returned no summary (e.g. it hit its turn budget mid-assembly — the brief file is usually already written): do NOT re-summarize the brief yourself; that pulls the expensive step back into this (often Opus) session, defeating the delegation. Instead SendMessage the agent by the agentId from its stop usage: "Return only the inline summary now." — it finishes cheaply in Sonnet. Only if that also fails, read the brief's Intent + Top priorities section (not the whole file) and print that.

Do NOT auto-invoke any other command. The user decides what's first.

Sources at MVP

GitHub (gh), Git (git), Linear MCP (optional), Google Calendar MCP (optional). Slack/Gmail are v2 opt-in — never queried, never piped raw. Scheduling + per-project config are designed in ${CLAUDE_SKILL_DIR}/references/config-schema.md, not built at MVP.

Graceful degradation contract

A missing source degrades the brief, never breaks it. git log alone (always available in a repo) is a valid minimum brief. Every absent or failed source becomes one honest line under the brief's Risks/assumptions block, so the reader knows what it does not cover.

© oliver-kriska, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references) in plugins/catchup/skills/catchup of oliver-kriska/claude-elixir-phoenix.

  • SKILL.md
  • references/brief-format.md
  • references/config-schema.md
  • references/source-adapters.md
  • references/time-window.md

Open the folder on GitHubat commit 9767a82

Compare with similar skills

Catchup next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Catchup compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Catchup this skilloliver-kriska/claude-elixir-phoenix565—~1.5kAutomated safety check: PassMIT
Contextual Commit Messagesyamadashy/repomix29k1 repos~2.7kAutomated safety check: PassMIT
React Router Release Notes Prepremix-run/react-router57k—~1.1kAutomated safety check: PassMIT
Caveman Commitvishiri/fantasia-archive40913 repos~642Automated safety check: PassGPL-3.0
PR Finalize Reviewmicrosoft/garnet12k—~3.1kAutomated safety check: PassMIT
ToolJet Multi-Repo CommitToolJet/ToolJet41k—~1.3kAutomated safety check: PassAGPL-3.0

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Categories

Questions about Catchup

What does Catchup do?

Summarize and review what changed while you were away. An agent skill from oliver-kriska/claude-elixir-phoenix. Catchup is an agent skill from oliver-kriska/claude-elixir-phoenix. Summarize and review what changed while you were away.

When should I use Catchup?

Catchup fits situations like: tasks that involve Commit messages.

How do I install Catchup in Claude Code?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill catchup -a claude-code`. Or copy the skill folder (plugins/catchup/skills/catchup in oliver-kriska/claude-elixir-phoenix) into .claude/skills/catchup in your project. Claude Code loads it when a task matches its description.

How do I install Catchup in Codex?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill catchup -a codex`. Or copy the skill folder (plugins/catchup/skills/catchup in oliver-kriska/claude-elixir-phoenix) into .agents/skills/catchup in your project. Codex loads it when a task matches its description.

Can I use Catchup in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add oliver-kriska/claude-elixir-phoenix --skill catchup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/catchup, .gemini/skills/catchup, .github/skills/catchup and .opencode/skills/catchup in your project.

What does Catchup need to run?

Going by SKILL.md and its folder, Catchup needs the command-line tools its instructions call (git and gh).

Does Catchup access the network?

SKILL.md contains no URLs. Its commands use git and gh, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Catchup safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Catchup use?

Catchup is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Catchup use?

About 1.5k tokens (SKILL.md is roughly 6.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 6.7k tokens, read only when the agent opens those files.

What are the alternatives to Catchup?

Skills that share tags, products or a category with Catchup: Contextual Commit Messages (yamadashy/repomix, 29k stars), React Router Release Notes Prep (remix-run/react-router, 57k stars), Caveman Commit (vishiri/fantasia-archive, 409 stars) and PR Finalize Review (microsoft/garnet, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Catchup?

oliver-kriska (a GitHub user) maintains it in oliver-kriska/claude-elixir-phoenix, which has 565 GitHub stars. The repository holds 111 skills in this directory. The repository was last updated on October 5, 2026.

Source: oliver-kriska/claude-elixir-phoenix on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.