CCBuddy: Skill for Codex

.agents/skills/feature-boundary-planner/SKILL.md

feature-boundary-planner is a skill for Codex from ccbud/CCBuddy. It costs 50 tokens per session (1,097 once invoked), scanned A, original, Apache-2.0.

A planning tool for tracing a proposed behavior change through an existing codebase. It maps user-interface areas, state ownership, communication commands, saved data, and validation steps before implementation.

In plain words
What is it for?
Use it for impact analysis, product-boundary planning, and implementation handoffs grounded in the checked-out repository.
Why use it?
It prevents feature plans from relying on obsolete files or guessed architecture. The result is limited to behavior supported by the current source or an explicit new requirement.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents).

This is ccbud/CCBuddy's own configuration. It tells Codex how to work on CCBuddy itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CCBuddy configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ccbud/CCBuddy. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ccbud/CCBuddy/main/.agents/skills/feature-boundary-planner/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ccbud/CCBuddy

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for feature-boundary-planner

README.md
[![agentmods](https://agentmods.dev/badge/skills/ccbud/ccbuddy/feature-boundary-planner/github.svg)](https://agentmods.dev/skills/ccbud/ccbuddy/feature-boundary-planner)
Your own site
<a href="https://agentmods.dev/skills/ccbud/ccbuddy/feature-boundary-planner"><img src="https://agentmods.dev/badge/skills/ccbud/ccbuddy/feature-boundary-planner/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for feature-boundary-planner

Your own site · 80×15
<a href="https://agentmods.dev/skills/ccbud/ccbuddy/feature-boundary-planner"><img src="https://agentmods.dev/badge/skills/ccbud/ccbuddy/feature-boundary-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,097 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00050 $0.01097
Opus 5.5 $0.00020 $0.00439
Sonnet 5 $0.00010 $0.00219
Haiku 4.5 $0.00005 $0.00110

Measured yesterday against content hash 0e9c39feae1d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-26, from the pricing page.

Security

Grade A, and why

feature-boundary-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.

.agents/skills/feature-boundary-planner/SKILL.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Feature Boundary Planner

Trace the requested behavior through the current checkout. A feature belongs in the result only when current source or an explicit new requirement supports it. Verify referenced paths and symbols before using them; do not reconstruct removed functionality from historical catalogs.

Choose The Scope

  • impact-only: inspect and report without changing code or product specs.
  • planning: establish behavior and acceptance cases before implementation.
  • implementation-handoff: turn confirmed decisions into a bounded implementation and validation plan.

Use the mode implied by the request. Clarify only unknown decisions that materially change the scope; do not ask the user to reconfirm facts already established in this task.

Find Current Evidence

  1. Search aliases and node IDs in ccbuddy-feature-graph.yaml for the user's terms. Read only matched nodes and their one-hop relationships, then verify the declared files, symbols and semantics against the current checkout. The graph is a curated seed index, not a complete feature inventory. Use source-discovery.md to fill gaps or start when there is no match. Read the relevant existing contracts and package scripts; read DESIGN.md for UI work and CONTEXT.md for plugin-store work.
  2. Locate the entrypoint with rg --files and focused rg -n searches. Trace direct callers with pnpm dep:refs <file>:<symbol> when the symbol is a TypeScript export. If an indexed codegraph tool is available, use it as additional evidence and verify its paths against the checkout.
  3. Classify the change: presentation, option source, draft/default, validation, commit effect, persistence, or recovery.
  4. Trace each user surface separately through validation and the command that commits the change. Shared UI components do not establish shared state or side effects.
  5. Identify the authoritative owner, derived views, protocol boundary, persistence and failure behavior. Name the semantic reason for each upstream or downstream dependency; imports alone do not prove a product relationship.
  6. Inspect one meaningful semantic hop first, expanding only when an unresolved owner or caller requires it. Rank relationships as must-inspect, should-inspect, conditional, invariant-only, or evidence-only.

Read the full file on GitHub · 69 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 69 lines · 50 tokens per session scan A 0e9c39feae1d

Subscribe to this mod's changes

feature-boundary-planner is a skill published in the GitHub repository ccbud/CCBuddy (8 stars, last pushed yesterday), licensed Apache-2.0. It adds 50 tokens to every session and 1,097 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-25.