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* [agent-network] Shared proto, OpenAPI schema, and generated types * [agent-network] Management: store, manager, synthesizer, policy engine, provider catalog, HTTP/gRPC API Adds the account-scoped agent-network module: provider/policy/budget CRUD and store, the reverse-proxy service synthesizer, policy selection + limit enforcement, the provider catalog (incl. Vertex AI and AWS Bedrock entries), and the management HTTP + proxy gRPC surfaces. * [management] Fix agent-network proxy-peer fan-out on affected-peer recompute The affected-peers resolver loaded only persisted reverse-proxy services, but agent-network services are synthesized on demand and never persisted. As a result the embedded proxy peer was never folded into the affected set when a client's group changed, so the proxy received no network-map update for a newly authorised client and rejected its handshake until a full resync (restart). loadProxyServices now merges the synthesized agent-network services (injected via a registration hook to avoid an import cycle), so proxy peers learn newly authorised clients immediately. * [proxy] Reverse-proxy middleware framework, chain, and request plumbing The per-target middleware chain (slots, dispatcher, mutation gate, metadata merger), body capture, access-log terminal sink, and the proxy wiring that builds + runs chains for synthesized agent-network services. * [proxy] LLM parsers, pricing, and builtin middlewares (OpenAI, Anthropic, Vertex AI, AWS Bedrock) Request/response parsers and SSE/event-stream metering, the embedded pricing table, and the builtin middleware set: request parser, router, policy limit-check/record, cost meter, guardrail, identity inject, response parser. Includes the path-routed providers — Google Vertex AI (keyfile:: service-account OAuth minting) and AWS Bedrock (bearer auth, invoke/converse/streaming, optional /bedrock prefix) — plus the Models allowlist and unmeterable-publisher deny. * [proxy] IPv6 in-place apply and TCP accept-loop hardening on netstack listeners * [agent-network] End-to-end test suite, module docs, and deployment preset * [agent-network] Fix codespell typos and exclude false positives - labelgen word pool: vermillion -> vermilion, racoon -> raccoon. - codespell ignore list: add flate (Go compress/flate package), recordin (a test-local identifier), and unparseable (a valid alternative spelling used consistently across identifiers + a metadata-value constant). * [management] Set LastSeen on injected proxy peer in realstack test (MySQL strict-mode) The injected embedded proxy peer had a PeerStatus with a zero LastSeen, which serializes to '0000-00-00' and is rejected by MySQL in strict mode (SQLite tolerates it). Set LastSeen to a valid time so SaveAccount succeeds on both engines. * [agent-network] Remove e2e shell-script suite from this branch The end-to-end shell scripts under scripts/e2e/ are maintained in a separate testing suite and are not part of this change set. * [agent-network] Polish module docs: remove internal review scaffolding, fix links, verify diagrams Strip PR-review framing, commit references, absolute paths, and stale internal references from the agent-network module docs; fix broken relative links; verify all diagrams against the current architecture. Remove the internal AI-reviewer prompt file. * [management] Refine session expiration handling to support 3-state encoding for SSO deadlines * [agent-network] Relocate agentnetwork package to internals/modules Move management/server/agentnetwork (and its catalog/, labelgen/, types/ subpackages) to management/internals/modules/agentnetwork, alongside the reverse-proxy module, and rewrite all importers. Pure relocation: package names, the synthesizer + affectedpeers registration hook, and store access (shared store.Store) are unchanged, so no import cycle is introduced (affectedpeers still depends only on the agentnetwork/types leaf). * [agent-network] Co-locate HTTP handlers in the module (RegisterEndpoints) Move the agent-network HTTP handlers from server/http/handlers/agentnetwork into the module at internals/modules/agentnetwork/handlers (package handlers) and rename the entrypoint AddEndpoints -> RegisterEndpoints, matching the reverse-proxy module convention. Wiring in http/handler.go updated accordingly.
106 lines
14 KiB
Markdown
106 lines
14 KiB
Markdown
# shared/api — wire contracts (proto + OpenAPI)
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> **Risk level:** Medium — wire-format surface that every other module pins against; backward-compat hinges on field-number discipline more than on logic correctness.
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> **Backward-compat impact:** Additive only (new proto fields use unallocated numbers, new RPCs default to `Unimplemented`, new OpenAPI schemas/paths are append-only; no existing field/RPC/schema removed or renumbered).
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## Module boundary
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This module owns the cross-process contract surface between management, proxy, and dashboard. Two artefacts: `shared/management/proto/proxy_service.proto` (management↔proxy gRPC) and `shared/management/http/api/openapi.yml` (dashboard/CLI↔management REST). Both have generated companions checked in (`proxy_service.pb.go`, `proxy_service_grpc.pb.go`, `types.gen.go`) which must travel in lockstep with their sources. `shared/management/status/error.go` is in scope only for the four new typed `NotFound` constructors that the new HTTP handlers return.
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Everything downstream — `management/agentnetwork`, `management/server/http/handlers/*`, `proxy/internal/*`, the dashboard SDK — consumes these types verbatim. The concern here is wire stability and codegen reproducibility, not behaviour: behaviour is covered in the management and proxy module guides.
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`management.proto` and `signalexchange.proto` are unchanged. `status/error.go` only receives four additive constructors (lines 208-227); no existing error types are reshaped.
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## Files
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| Path | Role |
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| ---- | ---- |
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| `shared/management/proto/proxy_service.proto` | Source of truth: 2 new RPCs, 1 new message group (`MiddlewareConfig` + slot enum), additive fields on `PathTargetOptions`, `AccessLog`, `RecordLLMUsageRequest` |
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| `shared/management/proto/proxy_service.pb.go` | Generated (protoc-gen-go) |
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| `shared/management/proto/proxy_service_grpc.pb.go` | Generated; adds `CheckLLMPolicyLimits` + `RecordLLMUsage` client/server stubs and `UnimplementedProxyServiceServer` defaults |
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| `shared/management/http/api/openapi.yml` | 15 new `AgentNetwork*` schemas, 9 new path groups under `/api/agent-network/*` |
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| `shared/management/http/api/types.gen.go` | Generated (oapi-codegen; see codegen note below) |
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| `shared/management/status/error.go` | Four `NotFound` constructors for the new resource kinds (lines 208-227) |
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## Architecture & flow
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```mermaid
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sequenceDiagram
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participant Dash as Dashboard / CLI
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participant Mgmt as management (HTTP+gRPC)
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participant Px as proxy
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Note over Dash,Mgmt: REST (OpenAPI / types.gen.go)
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Dash->>Mgmt: PUT /api/agent-network/providers (AgentNetworkProviderRequest)
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Dash->>Mgmt: PUT /api/agent-network/settings (AgentNetworkSettingsRequest)
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Dash->>Mgmt: GET /api/agent-network/consumption -> [AgentNetworkConsumption]
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Note over Mgmt,Px: gRPC ProxyService (proxy_service.proto)
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Mgmt-->>Px: SyncMappingsResponse{ ProxyMapping.path[*].options.middlewares,<br/>agent_network, disable_access_log, capture_* }
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Px->>Mgmt: CheckLLMPolicyLimits(account, user, groups, provider, model)
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Mgmt-->>Px: decision=allow|deny + selected_policy_id + attribution_group_id + window_seconds
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Px->>Mgmt: RecordLLMUsage(account, user, group_id, group_ids, window_seconds, tokens, cost)
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Px->>Mgmt: SendAccessLog(AccessLog{ agent_network=true })
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```
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The proto changes split into three independent slices: (1) **mapping enrichment** — `PathTargetOptions` grows fields 8-13 so management can ship middleware configs, capture limits, and the agent-network / log-suppression flags down to the proxy without a second RPC; (2) **two new request/response RPCs** (`CheckLLMPolicyLimits`, `RecordLLMUsage`) for per-LLM-request budget arbitration; (3) **observability tag** — `AccessLog.agent_network` so management can route logs to the right surface.
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The OpenAPI side is a thin CRUD surface — every resource (`Provider`, `Policy`, `Guardrail`, `BudgetRule`, `Settings`) follows the same `GET-list / POST / GET / PUT / DELETE` pattern, plus a read-only `/consumption` listing and a catalog endpoint. The `*Request` variants drop server-controlled fields (id, timestamps). `AgentNetworkBudgetRule` deliberately reuses `AgentNetworkPolicyLimits` to keep wire-shape parity with policies.
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## Public contracts added
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- gRPC RPCs (`proxy_service.proto:52-57`): `CheckLLMPolicyLimits(CheckLLMPolicyLimitsRequest) → CheckLLMPolicyLimitsResponse`, `RecordLLMUsage(RecordLLMUsageRequest) → RecordLLMUsageResponse`. Both unary; default `UnimplementedProxyServiceServer` returns `codes.Unimplemented` (`proxy_service_grpc.pb.go:283-289`).
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- New messages (`proxy_service.proto:145-175,448-502`): `MiddlewareConfig`, `MiddlewareSlot` enum, `CheckLLMPolicyLimitsRequest`/`Response`, `RecordLLMUsageRequest`/`Response`.
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- New `PathTargetOptions` fields 8-13 (`proxy_service.proto:124-140`): `capture_max_request_bytes`, `capture_max_response_bytes`, `capture_content_types`, `middlewares`, `agent_network`, `disable_access_log`. All default-false / zero; pre-existing fields 1-7 byte-for-byte unchanged.
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- `AccessLog.agent_network = 18` (`proxy_service.proto:258-261`).
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- `RecordLLMUsageRequest.group_ids = 8` (`proxy_service.proto:496-498`) — so the record path can fan out to every applicable budget rule's window without a re-lookup.
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- 15 new OpenAPI component schemas (`openapi.yml:5072-5829`): `AgentNetworkProvider[Request|Model]`, `AgentNetworkCatalog{Model,Provider,IdentityInjection,HeaderPairInjection,JSONMetadataInjection,ExtraHeader}`, `AgentNetworkPolicy[Request|TokenLimit|BudgetLimit|Limits]`, `AgentNetworkGuardrail[Checks|Request]`, `AgentNetworkConsumption`, `AgentNetworkSettings[Request]`, `AgentNetworkBudgetRule[Request]`.
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- 9 new path groups (`openapi.yml:12797-13460`): `/api/agent-network/{consumption,settings,budget-rules,budget-rules/{ruleId},catalog/providers,providers,providers/{providerId},policies,policies/{policyId},guardrails,guardrails/{guardrailId}}`.
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- Four typed NotFound errors (`shared/management/status/error.go:208-227`).
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## Invariants
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- **Field-number monotonicity.** Every new proto field uses a previously-unallocated number in its message: `PathTargetOptions` 8-13 (was 1-7), `AccessLog` 18 (was 1-17), `RecordLLMUsageRequest` 8. `SendStatusUpdateRequest.inbound_listener = 50` (pre-existing) reserves 50+ for observability extensions, so 8 on `RecordLLMUsageRequest` doesn't conflict.
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- **Old proxies stay compatible.** Old management never sends `disable_access_log`/`middlewares`/`agent_network` (zero value → existing behaviour); old proxies that don't decode these fields just drop them silently (proto3 unknown-field semantics) — log emission stays on. No pre-existing field number changed: the proto change is insertions only.
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- **Old management stays compatible.** The two new RPCs are registered on the same `management.ProxyService` descriptor; old proxies hitting them get `codes.Unimplemented` from the unimplemented embed (`proxy_service_grpc.pb.go:283-289`), which is the same fallback pattern `SyncMappings` already documents (`proxy_service.proto:20-21`).
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- **OpenAPI shapes are append-only.** New schemas are placed at the end of `components.schemas` (line 5072+); new paths at the end of `paths` (line 12797+). No existing schema's `required` list, enum, or property type was changed.
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- **`*Request` vs response asymmetry.** Read shapes (`AgentNetworkProvider`, `AgentNetworkPolicy`, `AgentNetworkGuardrail`, `AgentNetworkSettings`, `AgentNetworkBudgetRule`) require `created_at`/`updated_at`; the matching `*Request` shapes do not — server fills them. `AgentNetworkProviderRequest.api_key` is write-only (`openapi.yml:5158-5161` "never returned in responses"); reviewers should confirm the response schema (5072-5138) actually omits `api_key`.
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## Things to scrutinize
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### Correctness
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- `RecordLLMUsageRequest` carries both `group_id` (singular, the attribution group — field 3) and `group_ids` (plural, full membership — field 8). `b22d5a181` adds field 8 to drive account-budget fan-out; double-check that consumers can't accidentally key counters on the wrong one. Field comments at `proxy_service.proto:489-491` and `496-498` distinguish them but it's the kind of subtle thing a follow-up commit might collapse.
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- `PathTargetOptions.disable_access_log` is the only field whose default-false meaning **changes semantics** on the proxy side: false → log (status quo), true → suppress. Synthesizer sets `DisableAccessLog = !settings.EnableLogCollection`, so a missing/default settings row yields `EnableLogCollection=false → DisableAccessLog=true → suppressed`. Worth confirming downstream (`agentnetwork.synthesizer`) that operator-defined private services never inherit this flag — the proto field default protects them, but only if synth code is explicit.
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- `CheckLLMPolicyLimitsResponse.decision` is a free-form `string` (`proxy_service.proto:471`) rather than an enum. Only documented values are "allow" / "deny". An enum would prevent typo drift; consider before this RPC ships to external consumers.
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- `deny_code` (`proxy_service.proto:478-481`) is documented as "a stable label" but is also a free string. Pin the allowed set somewhere observable to the proxy.
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### Security
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- `AgentNetworkProvider.api_key` MUST be write-only. Schema split (request has it at line 5158; response omits it) looks correct, but a regression here leaks the upstream provider credential to every dashboard reader. Check that the handler explicitly zeros it on the response path.
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- `extra_values` / `identity_header_*` headers on `AgentNetworkProvider` get stamped onto upstream requests. Description at `openapi.yml:5099` says "values not declared by the catalog are ignored at synth time" — a contract this module documents but the synthesizer must enforce. Confirm the synth module honours it.
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- Cluster + subdomain on `AgentNetworkSettings` are documented immutable (`openapi.yml:5686-5694`) and the `AgentNetworkSettingsRequest` (lines 5733-5752) doesn't accept them. Verify the `PUT /api/agent-network/settings` handler can't be tricked by extra JSON keys (oapi-codegen's `additionalProperties: false` is not declared here; spec defaults to permissive).
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### Backward compatibility
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- The proto change is field-number additive: every previously numbered field keeps the same name + type, and the change is insertions only (no deletions in `proxy_service.proto`), so this holds at the source-text level.
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- `proxy_service_grpc.pb.go` adds two RPC handlers and registers them in `ProxyService_ServiceDesc.Methods` (lines 543-552). The existing entries are unchanged and order-preserving — gRPC method dispatch is name-keyed, so order doesn't matter, but reviewing the diff (no method renamed/dropped) is still worth a glance.
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- OpenAPI 3.0 doesn't have a built-in deprecation flow for paths; if any client tooling iterates `paths.*`, the additive routes shouldn't break it, but generated SDKs (especially the dashboard's) need a regen to gain access to `AgentNetwork*`.
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### Codegen pinning
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- `generate.sh` (`shared/management/http/api/generate.sh:14`) installs `oapi-codegen@latest` rather than a pinned version. **This is a reproducibility gap** — re-running the script later may produce a different `types.gen.go`. Either pin the version in `generate.sh` (e.g. `@v2.7.0`) or document the pin in a `tools.go`.
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- proto codegen has the protoc / protoc-gen-go version stamped in the generated file header (`proxy_service.pb.go:3-4`).
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- Regenerate locally and confirm zero diff against the committed `types.gen.go` / `proxy_service.pb.go`.
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## Test coverage
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| Test file | Locks down |
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| --------- | ---------- |
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| None in this scope | The proto and OpenAPI sources are tested transitively by the handler tests (`shared/management/http/handlers/agentnetwork/...`) and by the synthesizer/manager tests (`management/server/agentnetwork/...`). No round-trip serialisation test exists in the `proto/` or `api/` packages themselves. |
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| `shared/management/proto/*_test.go` | (absent) |
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| `shared/management/http/api/*_test.go` | (absent) |
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Acceptable for codegen artefacts, but a single golden-file test that re-runs `oapi-codegen` and `protoc` in CI and diffs against the checked-in files would close the reproducibility gap noted above.
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## Known limitations / explicit non-goals
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- **No deprecation surface.** Old fields/RPCs are kept silently; there is no `[deprecated = true]` annotation on anything. Acceptable here because nothing is being removed.
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- **No proto-side validation.** Numeric ranges (e.g. `window_seconds >= 60`, `cost_usd >= 0`, capture-byte clamps) are enforced in the OpenAPI schema via `minimum:` and inside Go code by the proxy/management, but `proto3` itself can't express them; downstream is expected to validate every message.
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- **`MiddlewareConfig.config_json` is `bytes`** (`proxy_service.proto:163`) — opaque to the proto layer. Schema validity is the middleware factory's problem. This is a deliberate tradeoff (per the comment at 161-162) but worth flagging: a corrupted/malicious config_json can only fail at proxy apply time, not at the wire-decode step.
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- **No catalog endpoint schema for the catalog itself** — the catalog data ships as a `GET /api/agent-network/catalog/providers` returning `[AgentNetworkCatalogProvider]` (`openapi.yml:13024`), but the catalog source-of-truth lives in `management/server/agentnetwork/catalog`, not here.
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- The reaper / GC design was cut from scope; no reaper-related types appear here.
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## Cross-references
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- Downstream: [management/store](20-management-store.md), [management/agentnetwork](21-management-agentnetwork.md), [management/handlers + wiring](22-management-handlers-wiring.md), [proxy/runtime](33-proxy-runtime.md)
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- End-to-end flow: [../01-end-to-end-flows.md](../01-end-to-end-flows.md)
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- Top-level: [../00-overview.md](../00-overview.md)
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