OLP — Open LLM Proxy

A personal- and family-scale multi-provider LLM proxy. One HTTP endpoint, many subscriptions behind it, automatic routing, automatic fallback, content-addressed caching — so your IDEs and family clients keep working as long as any of your subscriptions has quota left.

Status: v0.1 — bootstrap. Most of this README is a skeleton; sections marked placeholder land alongside the relevant phase of work (see phase plan).

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Why OLP

On 2026-05-14, Anthropic announced (effective 2026-06-15) that claude -p, the Agent SDK, and third-party agent traffic move out of the Pro/Max subscription pool into a separate fixed monthly Agent SDK Credit pool. OCP, OLP's predecessor, was a proxy around a single CLI — its core assumption was "subscription = unlimited within rate limits". That assumption breaks for Anthropic on the effective date.

The structural response is to stop relying on one provider's subscription terms remaining favourable. OLP spreads risk across multiple providers whose subscriptions still include CLI/programmatic use, routes intelligently between them, and caches aggressively so every request that does spawn a CLI counts.

OLP is not: a commercial multi-tenant SaaS; an enterprise gateway competing with LiteLLM / OpenCode / CLIProxyAPI on breadth; a model-capability router ("route to the smartest model" — you pick the model); a conversation-state store (your client handles that).

See ALIGNMENT.md for OLP's constitution and docs/adr/ for the founding ADRs.

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Quick Start

placeholder — lands with Phase 1.

Anticipated shape:

# install
npm install -g @dtzp555-max/olp

# run setup (writes ~/.olp/config.json, asks which providers to enable)
olp setup

# start the proxy (default port 3456 — same as OCP if you migrate)
olp start

# point your IDE at http://localhost:3456/v1/chat/completions with the OLP API key from `olp keys list`.

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Supported Providers

Source of truth: models-registry.json. This table is regenerated from the registry per the release_kit overlay; do not edit it out of sync.

OLP distinguishes Candidate Providers (declared as intended, not yet pinned) from Enabled Providers (authority pin filled + plugin landed + Phase audit passed). The v0.1 founding commit ships zero Enabled Providers — enablement is a Phase audit deliverable, not a bootstrap claim. See ALIGNMENT.md § Provider Inventory for the transition gate.

Candidate Providers

Provider key	CLI	Subscription / auth	Anticipated Tier	Anticipated Phase
anthropic	claude -p	Pro / Max OAuth (pre-2026-06-15); Agent SDK Credit pool after	D (re-eval post-2026-06-15)	Phase 1
openai	codex exec --json	ChatGPT Pro OAuth or API key	D	Phase 2
mistral	vibe --prompt --output json	Le Chat Pro API key	D	Phase 3
grok	grok -p --output-format streaming-json	xAI Build xai-... API key	C	Phase 8+
kimi	kimi -p --output-format stream-json	Moonshot Kimi API key	C	Phase 8+
minimax	TBD	MiniMax Token Plan (¥29+/mo)	B	Phase 8+
glm	TBD	Zhipu Coding Plan ($10+/mo)	B	Phase 8+
qwen	TBD	Alibaba Coding Plan ($50/mo)	B	Phase 8+

Risk tier guide. D = permissive / safe (eligible for default-enabled); C = tightening signal, no enforcement history (opt-in); B = service-level key revocation risk (opt-in + consent); A = excluded by default (cannot be opt-in enabled). Tier B providers prompt for explicit consent on first enable and record consent in ~/.olp/config.json. See ALIGNMENT.md § Risk Tier Framework.

Excluded by default (Tier A — evidence-backed, pending primary-source pin). Google Antigravity. See ADR 0006 for the named-prohibition + no-cost-advantage + reinstatement-friction rationale, and for the primary-source pinning follow-up that may force a Tier reconsideration if the Google FAQ language cannot be sourced within 90 days of 2026-05-23.

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Configuration

placeholder — full configuration reference lands with Phase 4 (fallback engine).

OLP reads its config from ~/.olp/config.json. The minimum useful shape:

{
  "routing": {
    "chains": {
      "<requested-model>": [
        { "provider": "<key>", "model": "<provider-model-id>" },
        { "provider": "<key>", "model": "<provider-model-id>" }
      ]
    },
    "soft_triggers": {
      "<provider-key>": { "<trigger>": <threshold> }
    }
  }
}

Note: routing.soft_triggers thresholds are parsed and stored but have no runtime effect at v0.1 — the quota polling path (quotaStatus() per hop) is deferred to v1.x per ADR 0004 Amendment 2. The evaluation logic exists and is tested; only the production data ingestion path is deferred.

Trigger types, fallback safety, idempotency rules, and the full example config land here when Phase 4 ships. See ADR 0004 (Fallback Engine Semantics & Safety) for the design.

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API Endpoints

placeholder — full table lands as each endpoint lands.

Endpoint	Method	Phase	Description
/v1/chat/completions	POST	1	OpenAI-compatible Chat Completions entry. Internally normalized to IR, dispatched to a provider plugin, response shape converted back.
/v1/models	GET	1	Lists models from models-registry.json.
/health	GET	1	Per-provider health snapshot (owner-only).
/cache/stats	GET	5	Cache hit rate, by-provider breakdown.
/v0/management/quota	GET	6	Per-provider quota / credit pool status (best-effort).
/dashboard	GET	6	Owner-only dashboard (localhost-bound by default).

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Environment Variables

placeholder — full table lands per-phase as variables are introduced.

Variable	Default	Description
OLP_PORT	3456	HTTP listener port.
OLP_CLAUDE_BIN	claude (from PATH)	Override path to the claude binary (Anthropic provider). Useful when multiple claude installs are present.
OLP_CODEX_BIN	codex (from PATH)	Override path to the codex binary (OpenAI provider).
OLP_VIBE_BIN	vibe (from PATH)	Override path to the vibe binary (Mistral provider).

📋 Planned (Phase 2) — not yet read by the codebase:

• OLP_HOME (~/.olp) — Config, providers, keys, cache, logs root. Currently hardcoded to ~/.olp/config.json in loadFallbackConfigSync; the env override path is a Phase 2 config-layer deliverable.
• OLP_LOG_LEVEL (info) — Log level filter (error/warn/info/debug). logEvent currently writes unconditionally; level filtering is a Phase 2 observability deliverable.

Further variables (per-provider auth path overrides, cache size limits, fallback-engine knobs) land with the relevant phase. See also the Implementation status table.

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Response Headers

Every response served through OLP carries:

• X-OLP-Provider-Used: <provider-key> — which provider's plugin served the request.
• X-OLP-Model-Used: <model-id> — which model the served provider used.
• X-OLP-Fallback-Hops: <n> — number of fallback hops (0 if served by the primary chain entry).
• X-OLP-Cache: hit | miss | bypass — cache layer outcome.
• X-OLP-Latency-Ms: <ms> — end-to-end latency observed at the proxy.

If a fallback chain is exhausted, X-OLP-Fallback-Exhausted lists the tried providers in order.

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Implementation status (as of 2026-05-24)

Phase 1 is in progress. This table reflects what is currently shipped vs. what is designed for later phases.

File / artifact	Status	Notes
server.mjs	✅ Shipped	HTTP listener + dispatcher
lib/ir/	✅ Shipped	IR definition + serializers (ADR 0003)
lib/providers/anthropic.mjs	✅ Shipped	claude -p spawn-binary plugin
lib/providers/codex.mjs	✅ Shipped	codex exec --json plugin
lib/providers/mistral.mjs	✅ Shipped	vibe --prompt plugin
lib/cache/keys.mjs	✅ Shipped	Content-addressed key computation
lib/cache/store.mjs	✅ Shipped	In-memory Map (file-backed layout: 📋 Phase 2 storage adapter)
lib/fallback/engine.mjs	✅ Shipped	Trigger evaluation + chain advancement (ADR 0004)
Soft trigger data path (quotaStatus() polling)	📋 Planned (v1.x)	Evaluation logic shipped + tested; data ingestion deferred per ADR 0004 Amendment 2
models-registry.json	✅ Shipped	SPOT for (provider, model) metadata
test-features.mjs	✅ Shipped	Comprehensive test suite covering IR, cache, fallback, and integration paths (CI: test.yml)
lib/keys.mjs	📋 Planned (Phase 2)	Multi-key auth, per-key namespacing, audit log
dashboard.html	📋 Planned (Phase 6)	Owner-only multi-provider dashboard
docs/provider-caveats.md	📋 Planned (Phase 3+)	Lossy-translation reference; for now documented inline in each plugin header
docs/openai-spec-pin.md	✅ Shipped (D30)	OpenAI spec snapshot for annual audit; v0.1 baseline pinned 2026-05-24
docs/alignment-audits/	📋 Planned	Output directory for annual alignment audits (first audit: 2027-05-14)
scripts/migrate-from-ocp.mjs	📋 Planned (Phase 7)	OCP → OLP migration tool
setup.mjs	📋 Planned	Setup wizard / initial config

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Architecture

OLP is a Node.js (ESM, .mjs) HTTP proxy with no build step and minimal dependencies. The high-level shape:

• Entry surface — server.mjs handles /v1/chat/completions and the administrative endpoints. Governed by OpenAI's /v1/chat/completions specification as the wire authority. See ALIGNMENT.md § Authorities.
• Intermediate Representation (IR) — lib/ir/ normalizes between the entry surface and provider-native shapes. The IR is the lingua franca; any extension is an ADR 0003 amendment.
• Provider plugins — lib/providers/<name>.mjs. Each plugin implements the contract in ADR 0002 (Plugin Architecture for Providers), spawns its CLI, and translates between IR and provider-native IO.
• Cache layer — lib/cache/ is a content-addressed cache keyed on the 11-field tuple defined in ADR 0005 § "Cache key composition (v1.0)" (provider, model, messages, tools, temperature, response_format, cache_control, max_tokens, top_p, stop, tool_choice — as of Amendment 2/D15). Per-key isolation, prompt-caching bypass, chunked stream replay, and singleflight. See ADR 0005 (Cache Layer Cross-Provider Design). Current backing store is an in-memory Map; file-backed storage is planned for Phase 2.
• Fallback engine — lib/fallback/ advances a configured chain one provider at a time on configured triggers, never retrying after the first response chunk has been emitted to the client. See ADR 0004.
• Multi-key auth — lib/keys.mjs (📋 planned, Phase 2) will carry OCP's per-OLP-key namespace isolation forward. Each OLP API key will have independent quota, cache namespace, and audit log; each key declares which providers it can access.

Read the ADRs in docs/adr/ in order before proposing structural changes.

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Phase plan

OLP lands in phases. Each phase has its own PR series and Iron-Rule-10 reviewer; this README's placeholders are filled per-phase via the release_kit overlay.

• Phase 0 — Repo bootstrap, ALIGNMENT.md, founding ADRs, CI workflows, PR template. (current)
• Phase 1 — server.mjs skeleton, IR, Anthropic plugin, cache D1+D4. Port from OCP.
• Phase 2 — OpenAI Codex plugin.
• Phase 3 — Mistral Vibe plugin.
• Phase 4 — Fallback engine + routing chains config + quota poll worker.
• Phase 5 — Cache cross-provider hardening (D2+D3).
• Phase 6 — Dashboard + observability (/v0/management/quota).
• Phase 7 — Release v0.1, OCP enters maintenance.
• Phase 8+ — Optional Grok / Kimi / tier-2 plugins; provider-native protocol endpoints; deterministic triggers.

Full spec (decision rationale, open questions, risks): ~/.cc-rules/memory/projects/olp_v0_1_spec.md on the maintainer's workstations.

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Migration from OCP

placeholder — scripts/migrate-from-ocp.mjs lands with Phase 7 (📋 planned, not yet authored).

Anticipated user-facing flow (target: <5 minutes):

1. Stop OCP (launchctl bootout the OCP service or ocp stop).
2. Install OLP.
3. Run olp migrate-from-ocp — copies ~/.ocp/keys/ to ~/.olp/keys/ and points provider plugins at OCP's existing auth artifacts where applicable.
4. Start OLP. Clients pointing at port 3456 keep working; their existing OLP API keys remain valid.

OCP's cache directory is not migrated: OLP's cache key format includes provider+model and warms cold naturally. OCP enters maintenance mode (stability fixes only) when OLP v0.1 ships; new development happens in OLP.

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License

MIT.

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Acknowledgements

OLP evolved from OCP (Open Claude Proxy). OCP's per-key isolation model, cache-layer design (D1–D4), dashboard, and alignment-constitution discipline are all carried forward. The structural generalization from single-CLI to multi-provider is what makes this a new project rather than an OCP minor version — see ALIGNMENT.md § Reference: How OCP's cli.js discipline maps to OLP.

Authors: project maintainer (with AI drafting assistance).