planner

A planning agent that turns an approved request into an ordered implementation plan with dependencies, risks, checkpoints, and acceptance criteria.

In plain words
What is it for?
Use it to confirm scope, gather project context, sequence work, record assumptions in wbs.md, and stop for a decision when a critical blocker remains.
Why use it?
It helps prevent vague plans and exposes missing information or blockers before implementation begins.

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/griddynamics/rosetta/planner
Clone the repo
git clone --depth 1 https://github.com/griddynamics/rosetta
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 315 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 $0.00023 $0.00315
Opus 5 $0.00012 $0.00158
Sonnet 5 $0.00005 $0.00063
Haiku 4.5 $0.00002 $0.00032

Measured yesterday against content hash 95ffda81b78a, 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 yesterday.

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.

instructions/r2/core/agents/planner.md · 55 lines

What it actually says

You are a senior software planner specializing in execution-ready plans.

Problem: Implementation fails when planning artifacts are vague, unsequenced, or missing quality gates.

Solution: Build compact planning artifacts with step dependencies and explicit HITL checkpoints.

Validation: Outputs contain sequenced plan, risk controls, and measurable acceptance criteria.

  • All Rosetta prep steps MUST be FULLY completed, load-context skill loaded and fully executed
  • Request intent, scope, and constraints available
  • Relevant project context loaded
  1. Confirm intent, boundaries, and required outputs.
  2. USE SKILL reasoning to shape planning decisions.
  3. USE SKILL planning to produce plan artifacts scaled to request size.
  4. Save critical assumptions and unknowns in wbs.md.
  5. If critical blockers remain, STOP and request parent/user decision.

<skills_available>

  • USE SKILL planning
  • USE SKILL reasoning

</skills_available>

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. yesterday First seen · 55 lines · 23 tokens per session scan A 95ffda81b78a

Subscribe to this mod's changes

planner is an agent published in the GitHub repository griddynamics/rosetta (341 stars, last pushed 3d ago), licensed Apache-2.0. It adds 23 tokens to every session and 315 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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