/context-preservation

name: context-preservation
description: State capture and restore across context window compactions. Monitors usage thresholds and serializes quality, task, and spec state for seamless continuation.
allowed-tools: Bash(*) Read Write Edit Glob Grep
metadata:
  author: babysitter-sdk
  version: "1.0.0"
  category: pilot-shell-infrastructure
  attribution: "Adapted from Pilot Shell by Max Ritter (https://github.com/maxritter/pilot-shell)"
graph:
  domains: [domain:software-engineering]
  skillAreas: [skill-area:agentic-loops, skill-area:orchestration-loop]
  workflows: [workflow:feature-development]
  topics: [topic:developer-experience]
  roles: [role:tech-lead, role:backend-engineer]

• Serialize current spec state (tasks, statuses, acceptance criteria)
• Capture quality pipeline state (last lint/format/typecheck results)
• Save TDD progress (current phase, iteration count, scores)
• Store context monitor metrics
• Write to `.pilot-shell/state.json`

2. State Restore (SessionStart / post_compact_restore)

• Read `.pilot-shell/state.json` on session start
• Restore spec task tracking state
• Restore quality baseline
• Resume TDD from last known position
• Log restoration summary

3. Threshold Monitoring

• Track context usage percentage (default threshold: 70%)
• Trigger preservation when threshold approached
• Calculate optimal preservation timing

State Schema

{
  "version": "1.0.0",
  "timestamp": "2026-03-02T12:00:00Z",
  "spec": {
    "title": "...",
    "taskStatuses": [{ "id": "...", "status": "COMPLETE" }],
    "currentPhase": "implement"
  },
  "quality": {
    "lastScore": 87,
    "lint": { "passed": true },
    "format": { "passed": true },
    "typecheck": { "passed": true }
  },
  "tdd": {
    "iteration": 2,
    "score": 92,
    "compliant": true
  },
  "context": {
    "usagePercent": 72,
    "preservedAt": "2026-03-02T12:00:00Z"
  }
}