planning

A planning procedure for choosing the cheapest practical path to test a software change with a real user or system.

In plain words
What is it for?
Use it to define a small first test, compare implementation routes, set time limits, and decide what work to postpone.
Why use it?
It reduces wasted work, unnecessary coordination, and building features before checking whether they solve the real problem.

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/megamen32/lasthumancommit/planning
Any agent
npx skills add megamen32/LastHumanCommit --skill planning
Clone the repo
git clone --depth 1 https://github.com/megamen32/LastHumanCommit

Made for: Claude Code, Codex.

Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 348 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 $0.00020 $0.00348
Opus 5 $0.00010 $0.00174
Sonnet 5 $0.00004 $0.00070
Haiku 4.5 $0.00002 $0.00035

Measured 2d ago against content hash 5e8087e2744a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

planning 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 2d 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.

plugins/last-human-commit/skills/planning/SKILL.md · 37 lines

What it actually says

Planning

Use only when planning can materially reduce wrong-path or coordination cost.

Procedure

  1. Record the latest business outcome and accepted MVP Definition of Done.
  2. Trace the actual production consumer path.
  3. State the shortest real canary and cheapest sufficient proof.
  4. Rank direct Lead work and delegation by wall-clock, scarce quota, handoff, retry, human interruption, and wrong-path cost.
  5. Load $task-decomposition when parallel or multi-cycle work remains.
  6. Treat every 20 active minutes as a progress and route checkpoint, not an agent lifetime limit.
  7. Give every declared work cycle an immutable minimum/maximum estimate and run the business time guard at observable checkpoints; report every crossed hour and original-maximum overrun.
  8. Add governance only for a concrete risk whose expected loss exceeds gate cost.
  9. When a human route choice is useful, present exactly two genuinely different approaches. For each, derive ideal/full -> normal -> YAGNI/Pareto MVP and show only the compressed MVP, its discarded scope, advantages, disadvantages, time, and real canary. Recommend the least-cost YAGNI route by default.

Do not

  • Do not present three ritual plans, technical previews, or architecture essays.
  • Do not call ideal/normal/YAGNI three alternatives; they are one compression pass applied inside each of two different approaches.
  • Do not forbid Lead implementation when it is cheaper.
  • Do not replace a route decision with a larger estimate.
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. 2d ago First seen · 37 lines · 20 tokens per session scan A 5e8087e2744a

Subscribe to this mod's changes

planning is a skill published in the GitHub repository megamen32/LastHumanCommit (2 stars, last pushed 2d ago), licensed MIT. It adds 20 tokens to every session and 348 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 2026-08-31.

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