haiku-adopt

haiku-adopt is a skill for Claude Code from gigsmart/haiku-method. It costs 21 tokens per session (347 once invoked), scanned A, original, Apache-2.0.

A reverse-engineering skill for documenting an existing feature as H·AI·K·U intent artifacts.

In plain words
What is it for?
Exploring a feature, proposing work units, deriving success criteria from tests, and writing intent, discovery, and operations files.
Why use it?
It creates a plan from code, history, tests, automation, deployment, and monitoring without changing the existing implementation.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the haiku plugin — 31 skills, 2 hooks, 2 MCP servers shipped together

Good fit Exploring a feature, proposing work units, deriving success criteria from tests, and writing intent, discovery, and operations files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gigsmart/haiku-method/haiku-adopt
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 gigsmart/haiku-method --skill haiku-adopt
Clone the repo
git clone --depth 1 https://github.com/gigsmart/haiku-method

Made for: Claude Code.

Or install haiku, the plugin that ships this one along with the rest of its 31 skills, 2 hooks, 2 MCP servers.

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 haiku-adopt

README.md
[![agentmods](https://agentmods.dev/badge/skills/gigsmart/haiku-method/haiku-adopt.svg)](https://agentmods.dev/skills/gigsmart/haiku-method/haiku-adopt)
Your own site
<a href="https://agentmods.dev/skills/gigsmart/haiku-method/haiku-adopt"><img src="https://agentmods.dev/badge/skills/gigsmart/haiku-method/haiku-adopt.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 347 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 $0.00021 $0.00347
Opus 5 $0.00010 $0.00173
Sonnet 5 $0.00004 $0.00069
Haiku 4.5 $0.00002 $0.00035

Measured 7d ago against content hash ae0b47b46a1c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

haiku-adopt 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 7d 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.

plugin/skills/haiku-adopt/SKILL.md · 35 lines

What it actually says

Adopt

Reverse-engineer an existing feature into H·AI·K·U intent artifacts.

Process

Phase 0 — Pre-checks

  • Check for slug conflicts

Phase 1 — Gather description

  • Get feature description
  • Ask for code paths (specific directories or search whole repo)
  • Ask for git references (PRs, branches, date range)

Phase 2 — Feature exploration (5 parallel subagents)

  1. Code path analysis (modules, entry points, dependencies)
  2. Git history analysis (commit groups, PR boundaries, timeline)
  3. Test analysis (test files, coverage patterns, verified behaviors)
  4. CI configuration analysis (pipelines, quality gates)
  5. Deployment surface analysis (containers, infra, monitoring)

Phase 3 — Propose intent and units (user confirms)

Phase 4 — Reverse-engineer success criteria from tests

Phase 5 — Generate operational plan (if operational surface found)

Phase 6 — Write artifacts (intent.md, unit files, discovery.md, operations/)

Phase 7 — Handoff (summary + next steps)

CRITICAL: MUST NOT modify existing code. Adopted units describe what already exists — they are written with synthetic terminal iterations[] (last entry result: "advance") and signed reviews{} / approvals{} so the cursor sees them as completed and never dispatches a hat against them. Forward-only invariant: completed work is immutable. Wait for user confirmation at each gate (Phase 3, 4, 5).

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. 7d ago First seen · 35 lines · 21 tokens per session scan A ae0b47b46a1c

Subscribe to this mod's changes

haiku-adopt is a skill published in the GitHub repository gigsmart/haiku-method (24 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 21 tokens to every session and 347 once invoked, about $0.0001 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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