plan-execution

A guide for carrying out an implementation plan that has already been approved. It treats the plan as a checklist, verifies its assumptions, completes each task in order, and checks the result after every piece.

In plain words
What is it for?
Use it when a written plan or checklist already exists and you need to implement it, run the relevant tests, inspect the changes, and stop if the plan conflicts with the repository.
Why use it?
It prevents an agent from quietly redesigning the work or drifting beyond the agreed scope. Focused checks and checkpoints expose problems early while preserving the plan’s interfaces and constraints.

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/thiientv/godmode/plan-execution
Any agent
npx skills add thiientv/godmode --skill plan-execution
Clone the repo
git clone --depth 1 https://github.com/thiientv/godmode

Made for: Claude Code, Codex.

Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 415 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 $0.00068 $0.00415
Opus 5 $0.00034 $0.00208
Sonnet 5 $0.00014 $0.00083
Haiku 4.5 $0.00007 $0.00042

Measured 2d ago against content hash 060c170c619f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan-execution 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.

skills/plan-execution/SKILL.md · 52 lines

What it actually says

Plan Execution

Treat the plan as an executable contract with room for evidence-backed corrections. Do not silently redesign it while implementing.

Before the first task

  1. Read the plan, referenced design, repository instructions, and current diff.
  2. Verify the starting branch, worktree, runtime, and baseline checks.
  3. Check that referenced files, commands, interfaces, and dependencies exist.
  4. Identify the first task whose result can invalidate the architecture.

Per-task loop

For each task:

  1. Restate the behavior and files in scope.
  2. Write or update the failing test/observation before implementation when the plan calls for behavior change.
  3. Run the focused check and confirm the failure is meaningful.
  4. Make the smallest change that satisfies the task.
  5. Run the focused check, then relevant neighboring checks.
  6. Inspect the diff for scope creep, accidental generated files, and contract drift.
  7. Record the result, evidence, and remaining limit before moving on.

If a test, dependency, or interface contradicts the plan, stop at a checkpoint and re-shape the affected task. Do not delete a check to make the plan green.

Integration discipline

  • Keep each slice buildable when practical.
  • Preserve the plan's public names unless an evidence-backed correction is approved.
  • Run the broader suite after related slices stabilize.
  • Use completion-verification for the final claim.

Completion condition

Execution is complete when every in-scope task has a fresh result, the final diff matches the approved scope, and unverified surfaces are reported.

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 · 52 lines · 68 tokens per session scan A 060c170c619f

Subscribe to this mod's changes

plan-execution is a skill published in the GitHub repository thiientv/godmode (93 stars, last pushed 7d ago), licensed MIT. It adds 68 tokens to every session and 415 once invoked, about $0.0003 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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