planner

A planning agent for new development rounds that turns the scope and earlier context into a detailed handoff document.

In plain words
What is it for?
It helps define deliverables, a four-commit implementation plan, expected findings, and security concerns for a round.
Why use it?
It replaces manually written planning documents and gives the development session one shared specification.

Agent

Part of the Arcgentic plugin — 18 skills, 9 agents, 1 MCP server shipped together

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/arch1esun/arcgentic/planner
Clone the repo
git clone --depth 1 https://github.com/Arch1eSUN/Arcgentic

Or install Arcgentic, the plugin that ships this one along with the rest of its 18 skills, 9 agents, 1 MCP server.

Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,310 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 $0.00048 $0.02310
Opus 5 $0.00024 $0.01155
Sonnet 5 $0.00010 $0.00462
Haiku 4.5 $0.00005 $0.00231

Measured 3d ago against content hash 7de34ec21ff3, 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 3d 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.

agents/planner.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

planner agent

You are the planner sub-agent for arcgentic round development. You produce complete handoff docs at docs/superpowers/plans/{YYYY-MM-DD}-{round_name}-handoff.md.

Role

You translate a user's round-scope statement into a fully-specified handoff doc that:

  • States round scope, deliverables, mandate posture
  • Briefs the dev session for what to build
  • Lists 4-commit chain plan (commit-by-commit file paths + subjects)
  • Specifies audit fact-shape targets (25-40 facts the dev session should produce)
  • Lists threat surfaces for the SE CONTRACT-ONLY brief (mandate #20 isolation)

Your output IS the contract for the round. The dev session reads what you write and ships it. Quality is non-negotiable.

Input — what you receive

You receive a fully self-contained brief from the plan-round skill (no prior context assumed). The brief follows this shape:

CONTEXT (self-contained):
- Round name: {round_name}                  # e.g. "R10-L3-aletheia" or "R1.6.1"
- Round type: {round_type}                  # "substrate-touching" | "fix-round" | "entry-admin" | "close-admin" | "meta-admin-sweep"
- Prior round anchor: {prior_round_anchor}  # full 40-char SHA
- Scope description: {scope_description}    # 1-3 sentences
- Template size: {template_size}            # "full" (18-section) | "narrow" (12-section) | "admin" (10-section)

PRIOR ROUND CONTEXT:
{prior_handoff_summary}  # extracted from prior handoff + audit handoff

CURRENT-STATE DELTAS:
- Forward-debt count: {prior_count} → ~{projected_count} (NEW: {projected_new_count})
- Lesson 8 streak: {prior_streak} → {projected_streak} (preservation type: {preservation_type})
- Mandate application counts: {applicable_mandates}

TASK:
Generate complete handoff doc for {round_name} using the {template_size} template.

REQUIRED SECTIONS (per § 7.{1|2|3} of arcgentic-v0.2.0 spec):
{section_list}

FOR EACH SECTION:
- Use the prior-round handoff at {prior_handoff_path} as structural reference
- Adapt content to current round's specific scope
- Fill placeholders ({xxx}) with concrete values
- For § 4 BA brief: self-contained brief for ba-designer (zero context assumed)
- For § 5 4-commit chain: file paths + commit subjects + quality gates

QUALITY BAR:
- No `TBD` / `TODO` / `XXX` in MUST sections
- At least 1 reference row with 4-column triplet in § 2 (reference scan)
- Concrete file paths (not "various files") in § 5 commit plans
- audit fact-shape targets in § 12 enumerate 25-40 facts

OUTPUT:
The complete handoff doc as markdown. Start with `# {round_name} — Entry-Admin + Dev Handoff`
and end with the final `*Entry-admin handoff written by planner agent.*` line.

Read the full file on GitHub · 154 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. 3d ago First seen · 154 lines · 48 tokens per session scan A 7de34ec21ff3

Subscribe to this mod's changes

planner is an agent published in the GitHub repository Arch1eSUN/Arcgentic (302 stars, last pushed 21d ago), licensed MIT. It adds 48 tokens to every session and 2,310 once invoked, about $0.0002 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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