feat+docs: D60 — Phase 4 charter (ADR 0010) + default OLP_PORT 3456 → 4567 (#40)

* feat+docs: D60 — Phase 4 charter (ADR 0010) + default OLP_PORT 3456 → 4567

Opens Phase 4 (Operator + Client UX) end-to-end. Per release_kit.phase_rolling_mode,
the version bump fires at Phase 4 close (v0.4.0), not at this D-day; D60 only
ships governance + the port default change.

## ADR 0010 — Phase 4 Charter

Phase 4 scope = 5 D-day groups (~13 D-days total):
- D60 (this commit): charter + default port
- D61-D63: SSE heartbeat + recentErrors[20] ring + /status combined endpoint
- D64-D67: olp Node-based CLI scaffold + olp doctor next_action framework
- D68-D70: olp-connect zero-config IDE setup + /health.anonymousKey + ADR 0011
- D71-D73: olp-plugin/ OpenClaw gateway plugin + docs/integrations/*.md bundle

Charter records the EXPLICIT DECISION to DEFER /v1/messages (Anthropic-shape
entry surface) on the rationale: under ADR 0009 P0 failure it provides no
billing benefit AND degrades worse on fallback than OpenAI-shape clients
(because OpenAI tool schema is the cross-provider lingua franca; Anthropic-
specific features cache_control / computer_use / text_editor / thinking
blocks have no clean fallback mapping). Re-open trigger: (a) ADR 0009 P0
success AND (b) maintainer-named family CC user.

README posture updated: Claude Code listed as NOT SUPPORTED as an OLP
client; recommended alternative is "Cline + OLP" (same fallback chain
available, better cross-provider compatibility).

## Default port 3456 → 4567

server.mjs:74 default value moves so OLP and OCP (which stays on 3456) can
co-host on the same machine without OLP_PORT env override. Existing
deployments wanting the pre-D60 default can set OLP_PORT=3456 in launchd
plist / shell env.

Verified port-change invariants:
- All test-features.mjs suites use port: 0 (ephemeral) — 0 test-surface impact
- Cache / fallback / provider plugins port-agnostic
- Dashboard 30s poll + management endpoints use relative paths
- 623/623 tests pass on D60 branch HEAD

## ADR amendments

- ADR 0001 § "Decision" port-conflict paragraph: struck + amended (co-host
  is now possible via 3456 → 4567 + launchd labels dev.olp.proxy vs
  dev.ocp.proxy)
- ADR 0008 § 6.6 default-port reference updated
- docs/adr/README.md index gains ADR 0010 row

## Authority

- ADR 0010 (this commit)
- ADR 0009 (interactive-mode placeholder — /v1/messages defer rationale)
- 2026-05-26 brainstorm: OCP comprehensive feature audit (subagent output)
  + multi-provider proxy / IDE integration prior-art survey (subagent
  output, both this session)
- docs/v1x-roadmap.md (Phase 4 was the named destination)
- CLAUDE.md release_kit.phase_rolling_mode (current_phase already Phase 4;
  this charter formalizes contents)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix: D60 reviewer P2-1 — soften ADR 0001 launchd-label assertion to forward-tense

Reviewer flagged the ADR 0001 amendment's launchd-label collision claim
("avoided via dev.olp.proxy vs dev.ocp.proxy") as present-tense fact when
the OLP plist generator hasn't shipped yet (lands D64-D70 per ADR 0010).
Soften to forward-tense with explicit cross-reference. The factual
claim ("co-host is possible") still stands because plist label is
controlled by the OLP project anyway; this is precision, not correction.

P2-2 (README "since v0.4.0" forward-dated branding) explicitly accepted
as prior-art-consistent with D44+ Phase 2 mid-window doc conventions —
no change.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

server.mjs

@@ -14,7 +14,10 @@
  * - Zero runtime npm dependencies in the proxy core
  *
  * Env vars:
- *   OLP_PORT  — listen port (default: 3456)
+ *   OLP_PORT  — listen port (default: 4567 since D60 / v0.4.0 — moved off 3456
+ *               so OLP can co-host with OCP for migration windows. ADR 0010 §
+ *               Default port. Set OLP_PORT=3456 explicitly to restore the
+ *               pre-D60 default when not co-hosting with OCP.)
  */
 
 import { createServer } from 'node:http';
@@ -71,7 +74,7 @@ const __dirname = dirname(fileURLToPath(import.meta.url));
 const pkg = JSON.parse(readFileSync(join(__dirname, 'package.json'), 'utf8'));
 const VERSION = pkg.version;
 
-const PORT = parseInt(process.env.OLP_PORT ?? '3456', 10);
+const PORT = parseInt(process.env.OLP_PORT ?? '4567', 10);
 const BODY_LIMIT = 5 * 1024 * 1024; // 5 MB
 
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