plan

A codebase-aware planning tool that examines how parts of a project connect before proposing implementation tasks. It creates a machine-readable plan and skips planning for very small changes.

In plain words
What is it for?
Use it before non-trivial changes to inspect project conventions, tests, dependencies, architecture, and likely change impact, then prepare an implementation plan.
Why use it?
It helps reveal which files, components, and data paths a change may affect. This reduces unexpected breakage caused by editing code without understanding its wider connections.

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/datit309/supergraph/plan
Any agent
npx skills add datit309/supergraph --skill plan
Clone the repo
git clone --depth 1 https://github.com/datit309/supergraph

Made for: Claude Code, Codex.

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,239 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 $0.00037 $0.01239
Opus 5 $0.00018 $0.00620
Sonnet 5 $0.00007 $0.00248
Haiku 4.5 $0.00004 $0.00124

Measured yesterday against content hash ffa9209ff3ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan 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.

plugins/supergraph/skills/plan/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/supergraph:plan

Scan codebase, map blast radius, create machine-readable plan.

Announce: "📐 /supergraph:plan — scanning codebase, creating plan..."

Quick Gate

< 20 lines, ≤2 files, no hub/bridge, complexity <10 → skip to /supergraph:tdd.

Steps

0. Read CONTEXT.md (if exists):

cat CONTEXT.md 2>/dev/null | head -60

Use domain vocabulary from CONTEXT.md in all plan task descriptions — never use raw file/class names where a domain term exists.

1. Read the codebase (MANDATORY before planning):

  • Read config file → language, framework, versions
  • Read 2-3 source files near target area → naming, imports, error handling
  • Read 1-2 test files → test structure, assertion style

2. Ensure graph: Reuse /supergraph:scan context. If not done → run scan first. Requires CBM_PROJECT + healthy index_status; if stale/degraded → index_repository (absolute path).

3. Graph analysis (parallel where independent): See references/codebase-memory-contract.md#Lifecycle. Run detect_changes, search_graph, trace_path (inbound/outbound/data-flow), and get_architecture (overview/clusters/boundaries/hotspots) in parallel (no dependencies). After get_graph_schema, run recipes hubs, bridges, test-gaps, cross-boundary (requires schema). Derive risk from evidence; preserve escalation: >20 files STOP, hub/bridge needs approval. Respect scan: TTL — skip index_repository if fresh per scan logic.

3b. Serena (optional): See serena/SKILL.md:Setup. If scan not run, call initial_instructions first, then find_referencing_symbols/find_implementations for key symbols. Cross-check with graph blast radius; persist callers via write_memory only if >10 files or hub/bridge. Skip if Serena unavailable.

4. Discuss approach (MANDATORY, user's language): Present findings 1-3 (naming/patterns, graph risk, task summaries). Get approval before step 5; revise if needed.

5. Create plan tasks — each task 2-5 min. Use exact machine-readable format:

Read the full file on GitHub · 105 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. yesterday First seen · 105 lines · 37 tokens per session scan A ffa9209ff3ca

Subscribe to this mod's changes

plan is a skill published in the GitHub repository datit309/supergraph (21 stars, last pushed 4d ago), licensed MIT. It adds 37 tokens to every session and 1,239 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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