# BRIEFING — 2026-10-01T02:19:00Z

## Mission
Investigate Milestone 4: Visceral Telegraphing, Evasion i-Frame & Leashing requirements, analyze pre-drafted telegraph renderer implementation from explorer_m4_1, inspect integration targets (index.html, entity_renderer.js, monster_system.js), and produce a rigorous handoff report with exact patch designs for the downstream worker.

## 🔒 My Identity
- Archetype: explorer
- Roles: investigation, synthesis, handoff
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2
- Original parent: bc45a740-aa86-45b5-8706-381960281bc6
- Milestone: Milestone 4: Visceral Telegraphing, Evasion i-Frame & Leashing

## 🔒 Key Constraints
- Read-only investigation — do NOT implement or modify project source code
- Inspect pre-drafted files in explorer_m4_1
- Ensure file length limits: logic files <= 350 soft cap / <= 500 hard cap; HTML <= 200 soft cap / <= 400 hard cap
- Output structured 5-component handoff report in explorer_m4_1_gen2/handoff.md
- Send message to parent upon completion

## Current Parent
- Conversation ID: bc45a740-aa86-45b5-8706-381960281bc6
- Updated: not yet

## Investigation State
- **Explored paths**:
  - `c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md` (R3 telegraph & evasion requirements)
  - `c:\Projects\FreeExile\PROJECT.md` (telegraph interface contracts and code layout)
  - `c:\Projects\FreeExile\TEST_INFRA.md` (testing architecture)
  - `c:\Projects\FreeExile\tests\e2e\test_poe2_zone_and_encounter_e2e.py` (test_telegraph_renderer_module_baseline XFAIL)
  - `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1\proposed_telegraph_renderer.js` (228 lines)
  - `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1\proposed_test_telegraph_renderer.py` (inspected and bug fixed)
  - `c:\Projects\FreeExile\client\webapp\index.html` (200 lines, exactly at soft cap)
  - `c:\Projects\FreeExile\client\webapp\js\engine\entity_renderer.js` (422 lines, ground layer integration target)
  - `c:\Projects\FreeExile\client\webapp\js\engine\monster_system.js` (496 lines, tight leeway to 500 hard cap)
- **Key findings**:
  - `proposed_telegraph_renderer.js` implements all 4 shapes (cone, circle, ring, line), PoE2 windup (0.6s–1.2s), poise break / stagger cancellation, and Canvas 2D isometric rendering.
  - Ring decal boundary rendering was enhanced with an inner stroke boundary in `explorer_m4_1_gen2/proposed_telegraph_renderer.js`.
  - `proposed_test_telegraph_renderer.py` had a hardcoded `parent.parent.parent` root defect, fixed with dynamic `find_project_root()`; verified passing 10/10 tests in 0.003s.
  - `index.html` integration must be placed inline on existing line 186 to preserve the 200-line soft cap.
  - `monster_system.js` integration must condense blank lines to remain safely below the 500-line hard cap (target ~490 lines).
- **Unexplored areas**: None for M4 exploration scope.

## Key Decisions Made
- Validated `proposed_telegraph_renderer.js` and promoted refined version with ring boundary rendering.
- Created robust unit test suite `proposed_test_telegraph_renderer.py` with dynamic root resolution.
- Formulated exact patch diff `proposed_patch.diff` for downstream worker.
- Documented complete 5-Component handoff report in `handoff.md`.

## Artifact Index
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\DISPATCH.md` — Task dispatch log
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\BRIEFING.md` — Situational awareness
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\progress.md` — Liveness tracking
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\proposed_telegraph_renderer.js` — Refined M4 telegraph renderer
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\proposed_test_telegraph_renderer.py` — 10-case unit test suite
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\proposed_patch.diff` — Integration patch diff
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m4_1_gen2\handoff.md` — 5-Component handoff report