plan-synthesize

A process for combining two or more competing coding plans into one revised plan. It uses a chosen primary plan, applies useful changes from the others, and supports later refinement.

In plain words
What is it for?
Use it after a planning command has produced multiple plan files, especially when you want to compare proposals, integrate revisions, and refine the combined plan.
Why use it?
It helps resolve disagreements between plans without choosing ideas from only one of them. The result brings stronger parts of several proposals into a single document.

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/hoangsonww/forge-agentic-coding-cli/plan-synthesize
Any agent
npx skills add hoangsonww/Forge-Agentic-Coding-CLI --skill plan-synthesize
Clone the repo
git clone --depth 1 https://github.com/hoangsonww/Forge-Agentic-Coding-CLI

Made for: Claude Code, Codex.

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 424 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 $0.00040 $0.00424
Opus 5 $0.00020 $0.00212
Sonnet 5 $0.00008 $0.00085
Haiku 4.5 $0.00004 $0.00042

Measured 3d ago against content hash 36c78c7d0d80, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan-synthesize 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.

.claude/skills/plan-synthesize/SKILL.md · 46 lines

What it actually says

/plan-synthesize — best-of-all-worlds

Feed competing plans into a single GPT Pro session and produce a hybrid that integrates the strongest ideas from every input.

Workflow

  1. Pick a primary. Choose the best of the competing plans as your "base" — usually GPT Pro's. Its content gets the git-diff revisions applied to it.

  2. Open the synthesis prompt. Read .flywheel/prompts/plan-synthesize-best-of-all-worlds.md. Copy it into a fresh GPT Pro (web) conversation.

  3. Paste the base plan, then each competitor. Label each clearly.

  4. Receive git-diff revisions. GPT Pro will produce a list of diff-style changes integrating the best ideas.

  5. Apply in-place with Claude / Codex. Use the prompt in .flywheel/prompts/plan-integrate-synthesis.md. The agent applies the diffs to .flywheel/plans/<date>-<slug>-gpt-pro.md (renaming it to -hybrid.md is a good practice) and reports which revisions it wholeheartedly agrees with, somewhat agrees with, or disagrees with.

  6. Iterate. Use .flywheel/prompts/plan-refine.md in fresh GPT Pro conversations 4–5 more times until convergence.

  7. Sanity overshoot. Once per synthesis, run .flywheel/prompts/overshoot-mismatch-hunt.md to catch elements the model silently dropped.

Output

A single hybrid plan at .flywheel/plans/<date>-<slug>-hybrid.md. This is the one you'll feed into /plan-to-beads.

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 · 46 lines · 40 tokens per session scan A 36c78c7d0d80

Subscribe to this mod's changes

plan-synthesize is a skill published in the GitHub repository hoangsonww/Forge-Agentic-Coding-CLI (22 stars, last pushed 17d ago), licensed MIT. It adds 40 tokens to every session and 424 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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