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packages/core/src/fetch-interceptor.ts states interception “Never intercepts” requests already going to the gateway, local requests such as localhost and 127.0.0.1 because they may be local LLM servers or the gateway itself, or non-LLM API paths such as arbitrary plugin HTTP calls and health checks.observeRequestHeaders() so in-process extensions can scope side-channel requests.isLocalHost() recognizes localhost, 127.0.0.1, 0.0.0.0, ::1, and [::1].shouldIntercept(url, gatewayBase) returns false when the URL starts with gatewayBase, when isLocalHost(parsed.hostname) is true, when the pathname does not match a known LLM API path, or when URL parsing throws; otherwise it returns matchesLLMApiPath(parsed.pathname).interceptUrlForProtocol(upstream, gateway, protocol) handles body-detected Path 2 requests such as /v2/chat/completions and /llm/messages: it selects PROTOCOL_GATEWAY_PATHS[protocol], strips a recognized LLM_ENDPOINT_SUFFIXES suffix to derive upstreamBase or falls back to upstream.origin, preserves upstream.pathname as upstreamPath, and appends upstream.search to the canonical gateway URL.warnedPaths: Set<string> deduplicates warnings by ${host}${pathname} for LLM-looking endpoints that bypass the gateway because they have no readable body or an unrecognized body shape.installFetchInterceptor() uses process-global key Symbol.for("lore.fetchInterceptor.originalFetch") through readOriginalFetchSlot() and writeOriginalFetchSlot() so every bundled or instantiated copy of @loreai/core shares the same original-fetch handle. This prevents stacked interceptors and the gateway → interceptor → gateway infinite loop associated with issue #1027, making core safe to inline into the Bun gateway bundle referenced by gateway/script/bundle.ts.readOriginalFetchSlot() is non-null, installFetchInterceptor() returns a no-op cleanup rather than installing another interceptor. A successful install stores globalThis.fetch, pre-parses config.gatewayBase, patches fetch with Object.assign(interceptor, originalFetch) to preserve properties such as preconnect, and returns cleanup that restores the original fetch and writes null to the shared slot./messages, /completions, or /responses; malformed URLs also pass directly to originalFetch.matchesLLMApiPath(upstream.pathname) succeeds, uses interceptUrl(upstream, gateway), constructs headers with buildGatewayHeaders(), observes the resulting headers, logs ${upstream.host}${upstream.pathname} → gateway, and calls the original fetch with the rewritten gateway URL. A null rewrite is treated as an impossible-but-safe pass-through fallback.pathLooksLLMLike(upstream.pathname) does. It calls extractBodyString(), then detectProtocolFromBody(); a detected protocol is routed through interceptUrlForProtocol() to the canonical gateway endpoint and logged with (body-detected ${detected}).matched no LLM API pattern — request bypassing Lore gateway. Add a pattern in fetch-interceptor.ts if this is an LLM endpoint.buildGatewayHeaders() is shared by URL-matched Path 1 and body-detected Path 2 so header handling can “never drift between them.” It accepts headers from either init.headers or a Request, preserves all existing headers, sets x-lore-upstream-url, conditionally sets x-lore-upstream-path only for an absolute path beginning with /, and adds config.getHeaders() entries only when the request does not already contain that header.config.getHeaders() are caught and logged as fetch-interceptor: getHeaders() failed:; errors thrown by optional config.onRequestHeaders() are caught and logged as fetch-interceptor: onRequestHeaders() failed:.packages/opencode/package.json, packages/opencode/src/internal.ts, packages/opencode/src/server.ts, and packages/opencode/test/server.test.ts.837ms using pnpm v10.28.0; a separate 4-file, 4-thread step finished in 37ms.10:20:22, duration 5.06s, transform 5.34s, setup 2.34s, import 11.29s, tests 162ms, environment 1ms.packages/opencode/test/internal.test.ts passed 12 tests: 1. remote gateway access headers > injects the access token only for the matching LORE_REMOTE_URL (4ms); 2. does not confuse provider credentials with gateway access (0ms); 3. does not forward managed credential header x-api-key from extras (1ms); 4. does not forward managed credential header X-Goog-Api-Key from extras (0ms); 5. does not forward managed credential header Authorization from extras (0ms); 6. does not forward managed credential header X-Lore-Gateway-Token from extras (0ms); 7. still forwards non-credential upstream extras (0ms); 8. surfaceGatewayUnavailable > raises a TUI-safe error toast carrying the message (5ms); 9. still records the failure via log.error (file + Sentry sink) (1ms); 10. swallows a synchronously throwing showToast (no crash) (2ms); 11. swallows a rejected toast promise (no unhandled rejection) (1ms); 12. tolerates a client without a TUI toast capability (1ms).packages/opencode/test/index.test.ts passed 13 tests: 1. LorePlugin config hook > disables built-in compaction (39ms); 2. registers hidden worker agents (3ms); 3. preserves existing agent config (2ms); 4. pins baseURL for every provider in cfg.provider (anthropic, openai, google, ...) (1ms); 5. preserves existing per-provider options (e.g. custom headers) (1ms); 6. disables OpenCode's default OpenAI header timeout when Lore routes the provider (0ms); 7. overrides OpenCode's inherited OpenAI header timeout (1ms); 8. is a no-op when gatewayBase is empty (test env / startup failure) (0ms); 9. adds a routed OpenAI provider config when cfg.provider is absent (1ms); 10. skips non-object provider entries (defensive against malformed config) (0ms); 11. LorePlugin hooks > returns an empty tool map (2ms); 12. returns only config and tool hooks (no event/transform hooks) (2ms); 13. plugin entry module export shape > exports only the plugin (LorePlugin + same-ref default) (0ms).