# Phase 74: Collaborator Profile And Session Continuity - Context

**Gathered:** 2026-04-11
**Status:** Implemented and verified
**Mode:** First implementation phase for `v1.48`

<domain>
## Phase Boundary

Open `v1.48` by making collaborator-memory continuity visible through durable
topic-scoped profile surfaces.

This phase must:

- derive `collaborator_profile.active.json|md` from collaborator-memory rows
- wire the profile through runtime bundle, `topic_status`, current-topic
  memory, and session-start artifacts
- keep hotspot budgets green while using extracted helpers instead of pushing
  more logic into the largest service surfaces

</domain>

<decisions>
## Implementation Decisions

### Locked decisions

- Reuse the existing collaborator-memory kinds `preference`, `working_style`,
  `trajectory`, and `coordination`.
- Keep `stuckness` and `surprise` out of collaborator profile because they were
  already promoted into `research_judgment`.
- Treat `collaborator_profile.active.json|md` as a topic-scoped continuity
  surface, not a hidden routing heuristic.

### the agent's Discretion

- Whether to surface collaborator profile in `topic_next` and
  `refresh_runtime_context` in addition to the red-test minimum.
- How much of the collaborator-profile summary should be copied into
  current-topic notes without duplicating the full profile artifact.

</decisions>

<canonical_refs>
## Canonical References

- `.planning/BACKLOG.md`
- `research/knowledge-hub/knowledge_hub/collaborator_profile_support.py`
- `research/knowledge-hub/knowledge_hub/runtime_bundle_support.py`
- `research/knowledge-hub/knowledge_hub/aitp_service.py`
- `research/knowledge-hub/runtime/schemas/progressive-disclosure-runtime-bundle.schema.json`
- `research/knowledge-hub/tests/test_aitp_service.py`
- `research/knowledge-hub/tests/test_schema_contracts.py`

</canonical_refs>

<code_context>
## Existing Code Insights

- `topic_shell_support.py` already materialized collaborator-profile artifacts,
  so the real gap was downstream consumption rather than artifact generation.
- The missing production surfaces were runtime bundle, status,
  current-topic/session-start continuity, and the runtime schema.
- `runtime_bundle_support.py` is watchlisted, so any new wiring had to stay
  thin enough to preserve maintainability budgets.

</code_context>

<specifics>
## Specific Ideas

- Normalize collaborator profile as a first-class runtime-bundle field.
- Add collaborator profile to `must_read_now` when it is available.
- Project collaborator-profile summary and durable paths into
  `current_topic.json|md`.
- Carry collaborator-profile paths into session-start artifacts so continuity is
  visible before deeper execution starts.

</specifics>

<deferred>
## Deferred Ideas

- research-trajectory continuity beyond the collaborator-profile summary
- learned route or mode reuse from whole research arcs

</deferred>

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*Phase: 74-collaborator-profile-and-session-continuity*
*Context captured on 2026-04-11 after Phase 74 implementation and verification*
