[Pepps233]

Summary

Preserve protected goal-mode context during emergency recovery while archiving eligible older history.
Keep the latest request, project instructions, incomplete tool exchanges, and the recent assistant exchange available verbatim.

Reasoning

Emergency recovery previously used a contiguous compaction boundary that could remove protected messages.
Recovery now selects eligible entries and replays protected history around the archived range.
Summary generation uses the model's available output capacity so reasoning summaries are not cut off by the ordinary response headroom limit.

Changes

• Preserve protected entries across recovery, export, resume, and forks.
• Reject compaction when the active request or system context changes during summarization.
• Add faux-provider coverage for protected blocks, summary budgets, and recovery lifecycle behavior.
• Carry forward the README link to SWE-Marathon data from the original working tree. Its target under docs/ is currently ignored and is not in this PR.

Testing

• npm run check passed on this main-based branch.
• Focused goal-mode tests passed: 14 files, 88 tests.
• ./scripts/test.sh did not pass in this sandbox: 416 passed, 10 failed, and 6 were canceled in the script tests. The failures involved owner-private temporary directory checks, denied local sockets, and absent built distribution files.