act

act is a command for Claude Code from JeremyDev87/codingbuddy. It costs 0 tokens per session (1,857 once invoked), scanned A, original, MIT.

A command that carries out an implementation plan using test-driven development (TDD), where tests are written or made to fail before the code is completed.

In plain words
What is it for?
Use it after planning to implement the steps, run the Red–Green–Refactor cycle, and return to planning when the work is done.
Why use it?
It gives implementation work a repeatable test, code, and cleanup cycle while applying basic quality checks.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is Legacy bare `/act` is deprecated. See [Migration Guide](../docs/migration-guide.md)..

Part of the codingbuddy plugin — 6 commands, 4 hooks, 1 MCP server shipped together

Good fit Use it after planning to implement the steps, run the Red–Green–Refactor cycle, and return to planning when the work is done.

Compare 6 commands from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/JeremyDev87/codingbuddy
agentmods
npx agentmods add commands/jeremydev87/codingbuddy/act

Made for: Claude Code.

Or install codingbuddy, the plugin that ships this one along with the rest of its 6 commands, 4 hooks, 1 MCP server.

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 act

README.md
[![agentmods](https://agentmods.dev/badge/commands/jeremydev87/codingbuddy/act/github.svg)](https://agentmods.dev/commands/jeremydev87/codingbuddy/act)
Your own site
<a href="https://agentmods.dev/commands/jeremydev87/codingbuddy/act"><img src="https://agentmods.dev/badge/commands/jeremydev87/codingbuddy/act/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 act

Your own site · 80×15
<a href="https://agentmods.dev/commands/jeremydev87/codingbuddy/act"><img src="https://agentmods.dev/badge/commands/jeremydev87/codingbuddy/act.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,857 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 $0.00000 $0.01857
Opus 5.5 $0.00000 $0.00743
Sonnet 5.5 $0.00000 $0.00371
Haiku 4.5 $0.00000 $0.00186

Measured 1mo ago against content hash 8987790d058d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

act 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 1mo 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.

packages/claude-code-plugin/commands/act.md · 218 lines

How it starts

The opening of the file, as written. The whole thing — 218 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACT Mode

Purpose

Execute the implementation plan with TDD

Mode Availability

Standalone Mode (no MCP server)

This command works without the CodingBuddy MCP server. In standalone mode, you get:

  • Mode detection and transition
  • TDD cycle execution (Red → Green → Refactor)
  • Basic quality standards enforcement
  • Agent-guided implementation

MCP Enhanced Mode

With the CodingBuddy MCP server connected, you additionally get:

  • parse_mode with full context tracking
  • Specialist agent dispatch for implementation verification
  • Contextual checklists (security, accessibility, performance)
  • Cross-session context persistence

Activation

Invoke via /codingbuddy:act (namespaced) or the ACT keyword.

Legacy bare /act is deprecated. See Migration Guide.

This command activates ACT mode for the CodingBuddy workflow.

Instructions

Important:

  • ACT mode executes the plan created in PLAN mode
  • After ACT completes, automatically return to PLAN mode (default behavior)
  • User can request EVAL for quality assessment

Trigger:

  • Type ACT after PLAN is ready
  • Execute implementation steps defined in PLAN

🔴 Agent Activation (STRICT):

  • When ACT is triggered, the default ACT agent (loaded via parse_mode in MCP mode; Software Engineer in standalone mode) MUST be automatically activated
  • The Agent's development philosophy and code quality checklist MUST be followed
  • In MCP mode, the agent framework is loaded via parse_mode. In standalone mode, basic workflow guidance is provided by the mode detection hook.

Purpose: Execute implementation following TDD cycle, augmented coding principles, and quality standards

What ACT does (with Software Engineer):

  1. Execute TDD Cycle (via Software Engineer)
    • 🔴 For core logic: Red → Green → Refactor cycle
    • Write failing test first
    • Implement minimal code to pass
    • Refactor only after tests pass
    • 🔴 Required: Follow Software Engineer's TDD cycle

Read the full file on GitHub · 218 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. 1mo ago First seen · 218 lines · 0 tokens per session scan A 8987790d058d

Subscribe to this mod's changes

act is a command published in the GitHub repository JeremyDev87/codingbuddy (31 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,857 tokens. 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.