tmb_planning

A coding-workflow guide that checks the project, clarifies the request, plans the change, assigns implementation, and verifies the result.

In plain words
What is it for?
Use it to plan code changes, decide whether to reuse existing code, write a specification, coordinate implementation, and verify completed work.
Why use it?
It reduces the risk of building the wrong thing or missing checks before closing a task.

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/trustmybot/plugin/tmb_planning
Any agent
npx skills add trustmybot/plugin --skill tmb_planning
Clone the repo
git clone --depth 1 https://github.com/trustmybot/plugin

Made for: Claude Code, Codex.

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,980 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 $0.00053 $0.01980
Opus 5 $0.00026 $0.00990
Sonnet 5 $0.00011 $0.00396
Haiku 4.5 $0.00005 $0.00198

Measured 2d ago against content hash 90624c9164b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tmb_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.

skills/tmb_planning/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planning — bro's code-touching flow

1. Verify the world model

world_model_get(depth=2) returns the project's directory tree with README-derived summaries. The main checkout shows only merged work — when unmerged_work is non-empty, those branch tips are part of the codebase too: read context from and base follow-up work on the newest relevant tip (task_provision base=<branch_id>). If the response carries warning: 'world-model-empty', run scan_run(source='bro_auto_initial') to build it, then re-read.

Zoom-in: world_model_get(path='src/api', depth=1). "Where does X live": world_model_search(query='X', mode='hybrid').

2. Triage the requirement

With the world model in hand, before you commit to building — two quick questions (judgment, not a research project):

  1. Is it actionable? Well-defined, testable, in scope? If it's vague hand-waving, surface the gap via tmb_concerns-protocol (or an AUQ) and pin it down before authoring a spec.
  2. Reuse or build? Once the requirement is real and we'd build something, prefer reuse over reinventing — check two distinct axes before committing to from-scratch code:
    • Feature reuse (a code dependency): does a public codebase / package / module / library already cover the work? Prefer depending on a maintained one over hand-rolling it. This is still a build — it flows on to step 3 — but the spec leans on the package (name it in the spec's Assumptions) instead of reimplementing it.
    • Cheatcode reuse (an agent capability): would a reputable published skill / MCP / plugin provide the capability itself? Prefer grabbing it via the cheatcode flow over building that capability — load tmb_cheatcode, which runs the full search→vet→recommend→Human-approve→install lifecycle (cheatcode_search alone skips the vet/approve/install steps).
    • Codify a repeatable in-house behavior worth keeping (a convention or checklist) → tmb_skill-creator, not a build spec.
    • From scratch: none of the above fits → genuine build, continue to step 3.

Read the full file on GitHub · 102 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. 2d ago First seen · 102 lines · 53 tokens per session scan A 90624c9164b0

Subscribe to this mod's changes

tmb_planning is a skill published in the GitHub repository trustmybot/plugin (6 stars, last pushed 3d ago), licensed MIT. It adds 53 tokens to every session and 1,980 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 2026-08-31.

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