Strategic Compact (OpenCode) — Autonomous Agent Edition

Purpose

This skill ensures that automatic compaction does not break an agent’s flow.

CRITICAL: compaction is treated as a background checkpoint:

• It can happen at any time near phase boundaries or context pressure.
• The agent must proactively encode durable state so compaction is always safe.
• The agent must not ask the user for confirmation just because compaction might occur.

This skill is about compaction-readiness, not manual compaction.

---

Operating Rules (Non-Negotiable)

1. Never require user input for compaction.

   • Do not ask “Should I compact?” or “Do you want a checkpoint?”
   • Assume compaction is automatic and proceed.

2. Never rely on chat history as the only source of truth.

   • If something must survive compaction, it must be recorded in files (or a dedicated session log) as durable state.

3. Prefer compaction-safe boundaries.

   • A compaction boundary is “safe” only when work is in a stable sub-state (see “Stability Conditions”).

4. Always include evidence.

   • Record file paths, commands run, and results (tests/build output summary). If unknown, write “unknown”.

---

Stability Conditions

Compaction is considered safe when ALL are true:

• Work is not mid-refactor with broken code paths (or the refactor scope is bounded and documented).
• The current goal and plan are written down durably.
• Key decisions/assumptions are explicitly recorded.
• There is a clear next-action checklist.

If conditions are not met, the agent must stabilize first:

• Finish the smallest coherent chunk
• Or save a WIP plan + current diff summary + immediate next steps into durable state

---

Durable State Checklist (Write This Before Any Likely Boundary)

The agent should maintain a single “durable state” artifact during long work:

• ./docs/dev/session-log.md (repo-local)

MUST at minimum, record:

• Current goal
• Current phase (research / plan / implement / test / debug)
• Key decisions & constraints
• Files touched / to be touched
• Commands run + results (summary)
• What worked / didn’t work
• Next steps checklist (concrete, executable)

CRITICAL: this is not optional; it is how the agent remains autonomous across compaction.

---

Phase Boundaries (Where Auto-Compaction Is Expected)

Treat these transitions as “high probability compaction moments”:

1. Research → Plan
2. Plan → Implementation
3. Implementation milestone → Testing
4. Debugging resolved → Return to feature work
5. Failed approach → Start alternate approach
6. Context pressure signs (looping, losing thread, repeated questions)

At these boundaries, the agent should automatically:

• Update durable state
• Ensure a clean, resumable plan exists
• Make the next steps explicit and minimal

---

Autonomous Behavior by Phase

Research Phase

Goal: explore without contaminating future context.

Autonomous rules:

• Keep raw exploration short-lived.
• Promote conclusions into durable state as soon as they are stable:
  • hypotheses that were tested
  • constraints discovered
  • final recommendation

Before leaving research:

• Write a “Plan” section in durable state (even if brief).
• Record which approaches were tried and what evidence supports conclusions.

Planning Phase

Goal: produce a stable, compaction-proof execution plan.

Autonomous rules:

• Convert intent into a checklist and file targets.
• Record invariants and guardrails (constraints, definitions, acceptance criteria).

Before implementation:

• Durable state must contain:
  • target files/modules
  • sequencing (step 1/2/3)
  • risks/unknowns
  • how success will be verified (tests/commands)

Implementation Phase

Goal: make progress while keeping work bounded.

Autonomous rules:

• Work in coherent increments.
• Avoid leaving the repo in an ambiguous state without recording it.

If work is mid-change and a boundary is approaching:

• Write a WIP checkpoint:
  • what changed so far
  • what remains
  • how to complete safely
  • how to verify

Testing/Validation Phase

Goal: convert changes into verified outcomes.

Autonomous rules:

• Record commands run and outcomes into durable state.
• If tests fail, record:
  • first failing signal
  • suspected root cause
  • next debug steps

Debugging Phase

Goal: resolve with minimal context pollution.

Autonomous rules:

• Keep a tight log:
  • symptom
  • root cause
  • fix
  • verification
• Once resolved, immediately write a postmortem-style note into durable state:
  • what happened
  • why it happened
  • how to prevent recurrence (optional)

---

Checkpoint Schema (Use This Exact Template)

CRTICAL: when updating durable state, use EXACTLY this schema:

Goal

Current phase

Current state

Decisions & constraints

Evidence (files/commands/results)

✅ What worked

❌ What didn’t work

🧩 Not attempted / remaining

⏭️ Next steps (checklist)

Rules:

• Be concise but complete.
• Prefer bullets.
• If proof is missing, write “unknown”.
• Include file paths whenever relevant.

---

Compaction-Readiness Triggers (Internal Heuristics)

When any of these are true, the agent must assume compaction may happen soon and update durable state:

• A milestone is reached (tests pass / feature done / PR-ready)
• A strategy changes (abandon approach, start new approach)
• The agent is about to switch subtask focus
• Tool calls are high / conversation becomes long
• The agent notices repetition, confusion, or lost details

Do not ask the user; just update durable state and proceed.

---

Minimal Interruptions

This skill forbids user-interactive “checkpoint requests”.

Instead:

• The agent silently maintains durable state.
• The agent continues the phase immediately after writing the checkpoint.

If writing to disk is not possible, the agent must:

• Output the checkpoint schema in-chat (still without asking questions),
• and continue.

---

Success Criteria

This skill is successful if:

• After compaction, the agent can resume immediately from durable state.
• No essential plan/decision is lost.
• The agent never asks the user to manage compaction timing.
• The work remains coherent across long multi-phase sessions.