Plan

Plan (Antigravity Edition)

Skill-Managed Lifecycle

Apply this skill directly through conversation state and its Markdown record. Plugin availability or external hooks are not prerequisites for this skill. Continue to respect independently enforced runtime restrictions; this instruction does not authorize bypassing them.

• On entry, resume, and after compaction, read this complete entrypoint, every currently required reference, index.md, and every manifest file before substantive work. For a new bundle, read the initialization guidance first, create the bundle, then verify its complete contents.
• Treat compaction recovery as a hard gate, not as optional rereading. Before the first substantive tool call after compaction, recover the active mode, canonical bundle root, and tracker ID from durable state; read and validate the bundle; reconcile pending questions, lifecycle transitions, and any completed but unrecorded work; and verify the Active Snapshot, Resume Checkpoint, plan status, and next safe action. If the exact active bundle cannot be resolved, do not guess from the newest directory: ask for its path and stop substantive work.
• On later turns, reuse current context only while it remains reliable. Reread the Active Snapshot for snapshot-only changes; reread the complete bundle when record content changes outside known writes or its state is uncertain.
• Treat a record write transaction as one coordinated file update: read the affected current files, declare new Markdown files in the manifest, update all affected content and cross-links, then verify identity, metadata, phase links, dependencies, and evidence agree. Finish or repair that update before unrelated mutation, handoff, or a final response. If persistence fails, report the blocker instead of treating unsaved state as durable.
• Before every user-facing response, persist material turn deltas and the resume checkpoint. A genuinely unchanged turn requires only verifying that the saved state remains accurate.
• Keep the exact canonical bundle root and tracker ID in the durable resume instruction and checkpoint so compaction can preserve the recovery key. A compacted conversation summary is context only; the validated bundle is authoritative workflow state.

On fresh entry, reserve and initialize the draft bundle before substantive inspection. Keep that exact bundle through approval and execute handoff. On entry from discuss, require its persisted handoff and create a separate plan bundle under the saving rules. Hand off to execute only after approval and execute-ready metadata are durable; upgrade the profile to Durable unless already Audited. Approval alone does not authorize implementation.

New plans use a version 4 bundle and the Lightweight profile. Profiles affect reread and persistence cadence only. Single-file and pre-v4 records are unsupported.

Use this skill to turn an ambiguous or important request into an approved execution plan while keeping one durable Markdown bundle from the beginning of planning.

Scripted Bundle Updates

Prefer a short Python standard-library script when one record update must coordinate several Markdown files, such as the index, decisions, phase files, and evidence. Use replace_file_content or write_to_file for small local edits when clearer; Python is a preferred method for coordinated multi-file persistence, not a requirement for single-file edits. Keep the existing authorization, decision, and handoff gates unchanged.

• Use a literal script input (for example, a quoted heredoc via run_command in a compatible shell) so Markdown backticks, dollar signs, and newlines are not evaluated by the shell. Use explicit UTF-8 encoding and preserve existing newline style and file permissions.
• Resolve the bound bundle root, use an explicit path allowlist from its manifest plus declared additions, and reject escaping paths or symlink targets. Do not discover mutation targets through a broad recursive glob.
• Read the affected files into a before-snapshot and construct all proposed contents in memory before writing. For replacements, check the expected occurrence count or unique section markers and raise an explicit error on missing or ambiguous matches; never rely on an unchecked .replace() or Python assert for write-safety checks. Preserve unrelated content and skip unchanged files.
• Validate the proposed bundle before the first write: identity, manifest, metadata, links, question mappings, and phase/dependency/evidence consistency where applicable. Keep one writer for the bundle and recheck that source files still match the snapshot before replacement; if they changed, reread and reconcile instead of overwriting.
• For whole-file rewrites, stage complete contents in temporary sibling files and replace each destination with os.replace, writing index.md last. Temporary staging files are not record artifacts; clean up only those created by this operation. Per-file replacement does not make a multi-file bundle atomic. On interruption or failure, inspect which replacements succeeded and repair the coordinated update before continuing; never blindly restore over another writer's changes.
• Read back the saved files, compare them with the intended contents, and revalidate the complete bundle and scoped diff. Report validation failures accurately; successful script exit alone does not prove that the update is consistent.

Reference Routing

Remove a conditional reference from Required references only after its stage and any dependent work have ended; persist and verify the set change under the record persistence contract. After compaction, reread every reference still required.

Load only the reference needed for the current stage, and read it completely before applying it.

• Read references/plan-record.md before creating, updating, approving, or handing off the Markdown plan.
• Read references/phase-planning.md only when phases, dependencies, waves, or subagent eligibility materially improve the plan.
• Read references/planning-workflow.md before creating or revising a plan, baseline analysis, or requesting approval.
• Keep Required references minimal: always references/plan-record.md; add references/planning-workflow.md while creating or revising a plan, analyzing its baseline, or obtaining approval; add references/phase-planning.md while phases, dependencies, waves, or subagent eligibility are in use. Persist and verify each set change and read the new reference before continuing.

Plan-First Boundary

Follow the plan workflow directly without attempting to switch or discuss the runtime's collaboration mode.

• Do not make production code edits, run destructive commands, commit, push, deploy, or implement the planned work while using this skill.
• After saving the approved plan, begin implementation only when the user explicitly requests execution; hand the saved plan to execute for that work.
• Read and respect repository instructions, user rules, AGENTS.md, active developer instructions, and higher-priority safety constraints.
• Before approval or handoff, verify that all open issues are resolved, no question blocks execution, and for phased plans, phase files, dependencies, waves, Antigravity Workspace settings (branch for mutating delegated phases, share strictly for read-only delegation, or N/A for sequential phases), and ownership are consistent between plan.md and phase files.

Relationship to Direct Discuss Handoffs

plan remains the full plan-first workflow when the user wants a separate reviewed handoff. It is not mandatory between discuss and execute: an execution-ready discussion bundle may be adopted directly. Do not create a duplicate plan bundle for that route.

Discuss Fallback

Follow the conversational restrictions and question style of discuss before planning when the current session has no reliable clue about what the user wants, or when the agent is confused about the right direction. Do not activate a separate discuss tracker lifecycle during this fallback; the already-created plan draft remains the only Markdown planning artifact.

Use this fallback when:

• The user's goal is too vague to form an actionable plan.
• The workspace or task context is missing and cannot be inferred safely.
• Multiple materially different approaches are possible and choosing one would be guesswork.
• The agent feels uncertain, stuck, or confused about the user's intent.
• More conversation is needed before writing a useful "How to do it" handoff plan.

While in this fallback, keep using the already established draft plan as the planning record:

• Do not edit source files, create unrelated artifacts, implement changes, or mutate external state. Draft-plan housekeeping and persistence remain required.
• Ask concise clarifying questions and follow the mandatory Question and Open-Issue Contract below.
• Help the user choose the target outcome, constraints, and preferred approach.
• Summarize the agreed direction before returning to the plan workflow.

Conversation Workflow

Before creating or revising a plan, establishing its baseline, or requesting approval, read and follow references/planning-workflow.md. Keep the Plan-First Boundary and Question and Open-Issue Contract in force.

Question and Open-Issue Contract (Antigravity Interactive & Chat Fallback)

Every question that requires a user response must include concrete options. Do not ask a bare open-ended question, including when requesting clarification, confirmation, or approval. Never ask a storage-choice question for the plan bundle.

• Present each distinct issue as a separate question block. Do not combine unrelated decisions under one option list.
• Provide 2-4 total practical, mutually distinguishable options that answer that question.
• Antigravity Interactive Modal (ask_question tool):
  • When seeking plan approval or resolving an open design decision in an interactive session, prefer calling the ask_question tool.
  • Provide 2-4 concrete options formatted as direct user responses (e.g. (Recommended) Duyệt kế hoạch hiện tại; chưa triển khai, Sửa cục bộ một số điểm, Đổi hướng tiếp cận khác).
  • Prefix the recommended choice with (Recommended).
  • Do not add an explicit "Other" option in tool arguments (the UI provides a write-in field by default).
  • Preserve the displayed option order when recording the question in decisions.md.
• Chat Fallback & Saved Markdown:
  • When the interaction channel is chat fallback or when recording questions in saved Markdown, put each option on its own line with an explicit consecutive number: 1., 2., 3., 4. as needed. Start at 1., leave a blank line between the question and its list, and never substitute bullets (-, *, •), checkboxes, letters, inline choices, or repeated 1. markers. This is a required response format, not merely an example style.
  • Mark one option as Recommended or Default when there is a reasonable choice.
  • Include Other — specify when the listed choices may not cover the user's intent.
  • Accept a bare number such as 1 as selection of that option in the pending question, or a number plus detail such as 4. đánh giá lại phương án fix. Apply any supplied qualification; do not require the user to repeat the option label. A bare selection of Other or an option needing a value does not supply the missing detail: ask a focused numbered follow-up.
• Single Pending Question Guard:
  • Keep only one user-facing question awaiting an answer at a time so a bare number or selection is unambiguous. A record may retain multiple open questions, each with its own numbered options and stable question ID; present only the next question in chat or via ask_question.
• Preserve Option Mapping:
  • Preserve the pending question's option mapping (or number-to-option mapping) in the record (decisions.md and Active Snapshot) so resumed sessions interpret short replies consistently.
• Out-of-Range and Revised Mapping Behavior:
  • If the user's number or response is out of range, ambiguous, or if choices must change, present the revised question before accepting a selection against it; clarify with concrete options instead of guessing.
• Free-Form Value Handling:
  • When the user must supply a free-form value unrelated to plan-file storage, such as a URL or external resource name, offer useful defaults or actions first and include an option to provide a different value. Never invent the free-form value.
• Non-Blocking Questions:
  • If a question is non-blocking, state which default the agent will use if the user does not answer.
• Saved Open Question Contract:
  • Apply these rules to questions in chat or interactive prompt and to every item in the proposed or saved plan's decisions.md (or Open Questions section).
  • For each open question saved in the record, record its stable question ID, concrete options, recommendation/default when applicable, and whether it blocks execution (blocks-execution: yes | no).
• Validation Before Save and Approval:
  • Before sending a response or saving a plan, check that every user-facing question and open issue has its own option list and that chat or interactive prompt has only one pending question. Rewrite any bulleted choices before sending.
  • Approval requires that no blocking open question remains unresolved (blocks-execution: yes must be 0) and all accepted decisions are recorded in decisions.md.

Required chat format (wording and language may adapt to the user):

Ban muon xu ly ban ke hoach nay the nao?

1. Duyet ke hoach: chot ban hien tai, chua trien khai. Recommended.
2. Sua cuc bo: ban neu phan can dieu chinh.
3. Lap lai ke hoach: danh gia lai huong tiep can.
4. Khac: ban mo ta huong ban muon.

The user can reply 1 or 4. đánh giá lại phương án fix. A selection of 1 in this example approves the plan only; it does not request execution. The same choices written with - bullets do not satisfy this contract.