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# Implementation Summary

**Session ID**: `phase22-session04-camp-link-boundaries` **Package**: apps/web **Completed**: 2026-07-05 **Duration**: 0.8 hours

***

## Overview

Implemented Phase 22 camp-link boundary readiness in the web game projection reducer. The reducer now supports a bounded exported pending-link helper, deterministic mission-start binding by exact prompt before same-hero fallback, terminal camp-link clearing, parser guards, replay safeguards, and explicit `suggestion_update` no-progress behavior without adding UI, protocol, server, audio, or persistence authority.

***

## Deliverables

### Files Created

| File                                                                                  | Purpose                                               | Lines |
| ------------------------------------------------------------------------------------- | ----------------------------------------------------- | ----- |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/spec.md`                   | Session scope, requirements, and implementation plan. | \~201 |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/tasks.md`                  | Completed 20-task checklist.                          | \~66  |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/implementation-notes.md`   | Task-by-task implementation evidence.                 | \~582 |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/code-review.md`            | Code review and repair report.                        | \~73  |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/security-compliance.md`    | Security and GDPR review report.                      | \~77  |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/validation.md`             | Validation report with PASS result.                   | \~188 |
| `.spec_system/specs/phase22-session04-camp-link-boundaries/IMPLEMENTATION_SUMMARY.md` | Closeout summary.                                     | \~69  |

### Files Modified

| File                                        | Changes                                                                                                                                           |
| ------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| `apps/web/src/lib/gameProjection.ts`        | Added pending-link validation, recording, mission binding, terminal clearing, parser guards, and explicit suggestion snapshot no-op behavior.     |
| `apps/web/tests/gameProjection.test.ts`     | Added focused reducer tests for link recording, exact and fallback binding, expiry, clearing, replay behavior, and snapshot no-progress behavior. |
| `.spec_system/state.json`                   | Marked Session 04 complete, cleared current session, and appended completion history.                                                             |
| `.spec_system/PRD/phase_22/PRD_phase_22.md` | Updated progress tracker to 4/8 sessions complete and set next upcoming session to Session 05.                                                    |
| `apps/web/package.json`                     | Bumped package version from 0.1.60 to 0.1.61.                                                                                                     |
| `package-lock.json`                         | Bumped the `apps/web` workspace lockfile version from 0.1.60 to 0.1.61.                                                                           |

***

## Technical Decisions

1. **Dormant helper boundary**: Exported `recordProjectionPendingLink` so a future real camp caller can supply `campId`, `heroId`, verbatim prompt, and expiry without wiring current Quest Board actions prematurely.
2. **Exact-first deterministic binding**: Resolved `mission_start` against exact `heroId + prompt` before same-hero fallback, with expiry pruning and one chosen pending link consumed per mission.
3. **No-progress snapshot handling**: Kept `suggestion_update` explicit as a reducer no-op for camp progress so snapshots cannot create links, camps, XP, banners, essence, kills, or War Tide changes.
4. **Bounded private matching state**: Limited ids, prompt length, duplicate triggers, sort order, and parser acceptance so persisted aggregate state remains bounded and serializable.

***

## Test Results

| Metric              | Value                            |
| ------------------- | -------------------------------- |
| Focused tests       | 24 passed, 0 failed              |
| Full tests          | 3183 passed, 1 skipped, 0 failed |
| Package typecheck   | PASS                             |
| Workspace typecheck | PASS                             |
| Biome check         | PASS                             |
| Coverage            | Not collected                    |

***

## Lessons Learned

1. Verbatim prompt matching is acceptable only when it stays short-lived, reducer-local, parser-guarded, and hidden from UI, protocol, diagnostics, and exports.
2. Snapshot traffic needs explicit reducer no-ops when a later phase owns the visible game consequence.
3. Same-reference no-op behavior is important now because Session 05 will fold this reducer through store persistence paths.

***

## Future Considerations

Items for future sessions:

1. Session 05 should wire projection folding and selectors without creating a second game-state authority.
2. Session 06 should decide how pending prompt-bearing links are persisted, flushed, expired, and erased locally.
3. Session 07 should include honesty regressions for replay, reconnect, mock, and snapshot traffic across the new camp-link paths.
4. Session 08 should document local erasure limits for projection state without implying broad trusted erasure.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 7
* **Files Modified**: 6
* **Tests Added**: Focused reducer coverage expanded to 24 tests
* **Blockers**: 0 resolved


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