Maintain a structured planning document tree made of roadmap/status files, implementation status or handoff TODO files, topic notes, decision records, open questions, ideas/inspiration pools, and repository/file-structure hygiene plans.
SkillScore88Maintained
Automatic
◆Project Management pack
Last verified 8/12/2026
What it changes
Passed 19 of 22 test cases with the skill, and 15 of 22 without it.
Without skill68%
With skill88%
Checks it passed that the model alone missed
The response declines to write production application software code.
The response recommends recording the thought as an entry in ideas/inbox.md without mandatory status labels.
The response recommends placing session-level TODO items in an implementation status file rather than roadmap.md.
and 2 more in the full report
5 fixed17 passed either way3 still failing0 broke
Pass-rate lift
+20 pp
Tokens
+248%
Agent turns
0%
Response time
-35%
Model gemini-3.6-flashMeasured 8/12/2026v122 of 25 cases passed with skill · 22 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 5
Prompt
When completing a plan-tree maintenance or edit request across our `docs/plan` folder, what three specific elements should be included in the closing summary report according to execution rules?
What was checked, without and with the skill
Checked
Without skill
With skill
The response identifies the mandatory closing report elements as changed files, unresolved questions, and the next maintenance action.
Missed
Passed
case-17 · gemini-3.6-flash · 8/12/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md360 linessingle file
Plan Tree
Use this skill to manage a tree of Markdown planning documents. The goal is to keep plans navigable, current, and internally consistent while preserving the user's intent and existing document style.
Execution Contract
For every plan-tree task:
Identify the plan root and user intent before editing.
Read the root index plus only the relevant status, topic, decision, question, idea, or history files.
Classify the request as an idea, promotion, status update, question, decision, archive, audit, resume, restructure, or consistency repair.
Preserve the existing planning entrypoint, registered plan roots, folder names, document style, and authority order unless the task is specifically to reorganize them.
Keep active roadmap and handoff files small; move historical evidence out of active state.
Update indexes, retrieval headers, and links when adding, moving, promoting, archiving, or splitting durable files.
Run the final checks before replying.
Report changed files, unresolved questions, and the next useful maintenance action.
Intent Routing
When the request maps to one of these intents, follow the corresponding behavior. Explicit shortcuts such as $plan-tree idea or $plan-tree resume are intent hints, not a strict command language; natural-language requests with the same meaning should behave the same way.
idea: add a low-commitment thought to ideas/inbox.md or the local equivalent.
promote: move an idea into a roadmap item, topic, open question, or decision, and link the original idea to the promoted artifact.
status: update active implementation or handoff state.
question: add, narrow, or resolve an open question.
decision: create or update a stable decision record.
archive: move superseded evidence, old status detail, or reference-only material out of active files.
audit: run consistency, retrieval, and drift checks without changing structure unless asked.
resume: follow the resume workflow and summarize current phase, TODO, blockers, next target, and last verification before editing.
Document Model
Prefer this generic shape when creating a new tree, but adapt to existing names and conventions:
Creates and maintains Architecture Decision Records (ADRs) following a structured format with State, Context, Decision, Considered, Consequences, Implementation, and References sections. Supports single-option decisions, multi-option decisions within one decision scope, multiple complementary decisions, and deferred decisions. Use when creating, updating, or reviewing architectural decisions, or when the user mentions ADR, architecture decisions, technical decisions, or design records.