[Pepps233]

Summary

Give selective context compaction a consistent historical outline so old proposals and missing verification do not read as current obligations.

Reasoning

A selected span can end well before the current task state, and can contain previous summaries.
Its summary should describe evidence within that span while preserving the historical scope and uncertainty of earlier summaries.
The outline is specified in the prompt without a structured schema.

Changes

• Specify four sections: Observations, Actions and outcomes, Decisions and rationale, and Verification and evidence limits.
• Describe proposals and missing verification as historical evidence rather than future work or instructions.
• Keep useful paths and identifiers within the relevant sections, with no separate artifacts section.

Testing

• npm run check passed.
• node ../../node_modules/vitest/dist/cli.js --run test/suite/goal-summary-evidence.test.ts test/suite/goal-context-markers.test.ts test/suite/agent-session-goal.test.ts passed: 35 tests across three files.
• Reused PR fix(coding-agent): preserve goal context #316's installed dependencies and hydrated model data after a fresh dependency install hit the local disk-space limit.
• This validates the existing compaction plumbing; no live-model evaluation of outline adherence was performed.