docs: ADR 0009 — Anthropic Interactive-Mode Path Placeholder (blocked on OCP P0) (#33)

Records OLP-side decision for the cross-project work OCP started in
ADR 0007 (interactive-mode execution pool to address post-2026-06-15
Anthropic billing split).

OPTION 3 — wait + port:

  - No OLP code change to lib/providers/anthropic.mjs until OCP
    ADR 0007 P0 experiment outcome lands (>= 2026-07-15).
  - Avoid duplicating the P0 risk by running an independent OLP
    experiment against the same Anthropic billing pool.
  - If P0 confirms Transport A (stdio NDJSON) or Transport B (PTY)
    bills as subscription rather than Agent SDK credit, port the
    validated pattern to OLP at that time.
  - If both transports fail, shelve this ADR; OLP Anthropic users
    fall back to Agent SDK $100 / month credit OR shift to multi-
    provider routing (Codex / Mistral) per Phase 1 design.

DECISION TREE recorded in § 3 so a future Phase 4 brief can act
mechanically once OCP P0 lands:

  Transport A wins → Option 1 (parallel impl) likely
  Transport B wins → Option 1 with PTY adapter (node-pty native dep
                     triggers engines-bump prior PR)
  Both fail        → Shelve ADR 0009
  Unobservable     → Extend wait

IMPLEMENTATION LANES (§ 4) — informational, not selected:

  Option 1 — OLP parallel implementation in lib/providers/anthropic.mjs
  Option 2 — Chain OCP as backend (OLP → OCP → Claude)
  Option 3 — Hybrid (prefer OCP backend, fallback to local pool)

NO PHASE 4 D-DAY scheduled. This is a decision-record placeholder
ONLY. Phase 4 standing-autopilot grant ("Phase 4+ requires new
authorization") still applies. When OCP P0 lands, maintainer issues
explicit Phase 4 "go" naming this ADR to trigger implementation
selection + D-day work.

DOCUMENTATION:

  - docs/adr/0009-interactive-mode-path-placeholder.md (new, ~200 lines)
  - docs/adr/README.md index: ADR 0009 row added
  - Cross-machine cc-rules memory (~/.cc-rules/memory/learnings/
    ocp_adr_0007_interactive_mode_pool.md, committed in cc-rules
    a16b775) bridges OCP ADR 0007 + OLP ADR 0009 so future Phase 4
    planning sessions in either repo pull the shared context.

Test count: 601 → 601 (docs-only; no test or .mjs file touched).

AUTHORITY:

  - OCP ADR 0007 (~/ocp/docs/adr/0007-interactive-mode-pool.md,
    Draft 2026-05-25) — the triggering external work.
  - OLP ADR 0001 (Project Founding) — the 2026-06-15 billing-split
    motivation that this ADR reaffirms.
  - OLP ADR 0006 (Provider Inclusion) — the anthropic plugin's tier
    that this ADR would amend if/when implemented.
  - CLAUDE.md release_kit overlay phase_rolling_mode (current_phase:
    Phase 4) — this ADR explicitly does NOT consume a Phase 4 D-day.
  - Standing autopilot grant — Phase 4+ requires new authorization;
    this placeholder is a decision-tree pre-record, not Phase 4
    implementation.

ALIGNMENT.md scope check: docs-only commit (new ADR + index update).
No provider plugin / entry surface / IR change.

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

docs/adr/README.md

@@ -22,6 +22,7 @@ New ADRs increment from the highest existing number. Filenames are `NNNN-<short-
 | [0006](0006-provider-inclusion.md) | Provider Inclusion / Exclusion + Risk-Tier Framework | The 4-tier classification (A excluded by default / B explicit consent / C opt-in / D eligible-for-default-enabled), Candidate-vs-Enabled distinction, current v0.1 candidate inventory (0 Enabled), Antigravity exclusion rationale (named prohibition + no cost advantage + reinstatement friction; pending primary-source pin), consent UX, future provider addition procedure. |
 | [0007](0007-multi-key-auth.md) | Multi-Key Auth (`lib/keys.mjs`) | Phase 2 design ADR (D43-B, 2026-05-25). Option 2 (filesystem manifest at `~/.olp/keys/<key-id>/manifest.json`) + opaque `olp_<32-byte>` token + SHA-256 hash. Owner / guest / anonymous tier gating with explicit `config.json auth.allow_anonymous` (default false). Bootstrap keygen command surface + `OLP_OWNER_TOKEN` env override with stable synthetic `key_id`. Audit ndjson append-only at `~/.olp/logs/audit.ndjson`, warn+1-retry on append failure. Rejects direct SQLite port at v0.2.0 due to Node baseline (`engines >=18` + CI 20/24 vs `node:sqlite` added 22.5.0 / RC); Option 3 hybrid documented as forward path when Phase 3+ Dashboard / SQL-aggregate quota arrives. |
 | [0008](0008-dashboard-and-audit-query.md) | Dashboard + Audit Query Layer | Phase 3 design ADR (D48, 2026-05-25). Static HTML dashboard + vanilla JS + fetch (no build step). In-memory ndjson scan for aggregate queries (O(N) per call; family-scale acceptable; defers SQLite migration to Option 3 hybrid trigger). Daily audit rotation `audit-YYYY-MM-DD.ndjson` on first append after UTC midnight; cross-file query layer for rolling 30-day windows. Owner-only gating on `/dashboard` + 3 `/v0/management/*` JSON endpoints reusing ADR 0007 § 7 auth model. 30s page poll (no SSE infra). Panels: per-provider quota / 24h request+cache+fallback / 30d spend trend / top-N fallback chains per spec § 4.6. Opens ADR 0007 § 12 Phase 3 deferral (Dashboard + audit query + rotation). |
+| [0009](0009-interactive-mode-path-placeholder.md) | Anthropic Interactive-Mode Path (Placeholder) | Placeholder ADR (2026-05-25, Draft) — blocked on OCP ADR 0007 P0 experiment outcome. Records the maintainer's "wait + port" decision: do NOT independently implement; ride OCP's P0 result. If P0 confirms Transport A (stdio NDJSON) or B (PTY) bills as subscription rather than Agent SDK credit, port to OLP `lib/providers/anthropic.mjs` (Option 1 parallel impl, or Option 2 OCP-as-backend; decision deferred to P0-resolution time). If P0 fails on both, shelve. No Phase 4 D-day scheduled until P0 lands AND maintainer issues explicit "go" naming this ADR. |
 
 ## When to write a new ADR