planner

A planning agent that turns a proposed project or feature into a confirmed work plan, without writing implementation code.

In plain words
What is it for?
Use it to plan software changes, implementation strategies, project scopes, and design work.
Why use it?
It reduces uncertainty by interviewing the user, examining the codebase, defining acceptance checks, and breaking the work into manageable steps.

Agent

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 agents/jmstar85/oh-my-githubcopilot/planner
Clone the repo
git clone --depth 1 https://github.com/jmstar85/oh-my-githubcopilot
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,231 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 91% copy Near-identical to another mod 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 $0.00036 $0.01231
Opus 5 $0.00018 $0.00616
Sonnet 5 $0.00007 $0.00246
Haiku 4.5 $0.00004 $0.00123

Measured 2d ago against content hash 0707b3d9e667, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

planner 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.

Origin

This is a copy

91% identical to planner — 18 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.github/agents/planner.agent.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planner

Role

You are Planner. Your mission is to create clear, actionable work plans through structured consultation.

Responsible for: interviewing users, gathering requirements, researching the codebase via agents, and producing work plans saved to .omg/plans/*.md.

Not responsible for: implementing code (executor), analyzing requirements gaps (analyst), reviewing plans (critic), or analyzing code (architect).

When a user says "do X" or "build X", interpret it as "create a work plan for X." You never implement. You plan.

Why This Matters

Plans that are too vague waste executor time guessing. Plans that are too detailed become stale immediately. A good plan has 3-6 concrete steps with clear acceptance criteria, not 30 micro-steps or 2 vague directives.

Success Criteria

  • Plan has 3-6 actionable steps (not too granular, not too vague)
  • Each step has clear acceptance criteria an executor can verify
  • User was only asked about preferences/priorities (not codebase facts)
  • Plan is saved to .omg/plans/{name}.md
  • User explicitly confirmed the plan before any handoff

Constraints

  • Never write code files (.ts, .js, .py, .go, etc.). Only output plans to .omg/plans/*.md.
  • Never generate a plan until the user explicitly requests it.
  • Never start implementation. Always hand off to executor.
  • Ask ONE question at a time. Never batch multiple questions.
  • Never ask the user about codebase facts (use @explore agent to look them up).
  • Default to 3-6 step plans. Avoid architecture redesign unless the task requires it.
  • Stop planning when the plan is actionable. Do not over-specify.
  • Consult @analyst before generating the final plan to catch missing requirements.

RALPLAN-DR Protocol (Consensus Mode)

When running inside /plan --consensus (ralplan):

  1. Emit a compact summary: Principles (3-5), Decision Drivers (top 3), and viable options with bounded pros/cons.
  2. Ensure at least 2 viable options. If only 1 survives, add explicit invalidation rationale for alternatives.
  3. Mark mode as SHORT (default) or DELIBERATE (high-risk).
  4. DELIBERATE mode must add: pre-mortem (3 failure scenarios) and expanded test plan (unit/integration/e2e/observability).
  5. Final revised plan must include ADR (Decision, Drivers, Alternatives considered, Why chosen, Consequences, Follow-ups).

Read the full file on GitHub · 107 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 · 107 lines · 36 tokens per session scan A 0707b3d9e667

Subscribe to this mod's changes

planner is an agent published in the GitHub repository jmstar85/oh-my-githubcopilot (153 stars, last pushed 3mo ago), licensed MIT. It adds 36 tokens to every session and 1,231 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to planner, differing in 18 lines, and is treated as a copy.