Last Tag

What it does

When your agent uses it

• User asks what changed since last release
• Commits since last tag
• Wants to see recent unreleased changes

Example prompts

• “what changed since last release”
• “commits since last tag”
• “last-tag”
• “/last-tag”

Requirements

• Pre-approved tools (allowed-tools): Bash, AskUserQuestion

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

1. 1Get commits since that tag with format date|author|hash|subject (substitute TAG with actual value)
2. 2Check if all commits have the same author - extract unique authors from step 2 output.

What it can do on your machine

Read from SKILL.md and the folder at commit 99e1c8d. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Bash
  • AskUserQuestion

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • git

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

• Network

  No URLs in SKILL.md. Its commands use git, 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

Last Tag loads about 688 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 193 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~53

When it runs · the whole SKILL.md, loaded when a task matches

~688

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

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Bash, AskUserQuestion

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 umputun/cc-thingz at commit 99e1c8d, republished under its MIT licence (© umputun). 193 words, ~688 tokens.

name

last-tag

description

Show commits since the last tag in a formatted table. Use when user asks "what changed since last release", "commits since last tag", "last-tag", "what's new", or wants to see recent unreleased changes.

allowed-tools

Bash, AskUserQuestion

git fetch origin --tags

git describe --tags --abbrev=0

git log TAG..HEAD --format="%ad|%an|%h|%s" --date=short

Last tag: v1.2.3
Author: John Doe

| Date       | Commit  | Description                    |
|------------|---------|--------------------------------|
| 2025-12-20 | abc1234 | fix: resolve null pointer      |
| 2025-12-19 | def5678 | feat: add user authentication  |

Last tag: v1.2.3

| Date       | Author   | Commit  | Description                    |
|------------|----------|---------|--------------------------------|
| 2025-12-20 | John Doe | abc1234 | fix: resolve null pointer      |
| 2025-12-19 | Jane Doe | def5678 | feat: add user authentication  |

No tags found in repository

Last tag: v1.2.3
No commits since this tag

question: "Show commit details?"
header: "Details"
options:
  - label: "All commits"
    description: "Show full details for each commit"
  - label: "None"
    description: "Skip details"
  - label: "Specific commit"
    description: "Enter commit hash to inspect"

git show --stat --format="Commit: %h%nAuthor: %an <%ae>%nDate: %ad%n%n%s%n%n%b" --date=short HASH

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

Files

Just SKILL.md in plugins/release-tools/skills/last-tag of umputun/cc-thingz.

Open the folder on GitHubat commit 99e1c8d