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ee710b7e-82a8-4e0c-b2c7-6fa88599fa78["lore_tm_v1_f0y-cVHcqMs8VjxMg6sE2iH4I6W85pSRNGZ-sWqELwM"]
/home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:246-268 defines interceptUrlForProtocol(upstream, gateway, protocol): it maps BodyProtocol through PROTOCOL_GATEWAY_PATHS, strips the first matching LLM_ENDPOINT_SUFFIXES suffix so upstreamBase identifies the provider base, falls back to upstream.origin, preserves the original upstream.pathname as upstreamPath, and constructs gatewayUrl as ${gateway.origin}${gatewayPath}${upstream.search}. This fallback handles non-standard endpoints such as /v2/chat/completions and /llm/messages when body shape identifies the protocol.shouldIntercept(url, gatewayBase) in /home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:276-299 only intercepts known LLM API paths on remote hosts. User established the explicit rule “Never intercepts:” requests already going to the gateway, local requests, or non-LLM API paths; malformed URLs also return false.shouldIntercept() returns false when url.startsWith(gatewayBase), preventing gateway requests from being recursively rerouted.isLocalHost() recognizes localhost, 127.0.0.1, 0.0.0.0, ::1, and [::1]; these hosts must “never be routed through the gateway” because they may be local LLM servers or the gateway itself and interception risks an infinite loop.mayBeLLMRequest(url) in /home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:314-321 treats URLs containing /messages, /completions, or /responses as potentially requiring LLM routing or direct-gateway auth observation./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:323-375 states that rewriteRequest() never reads request bodies: known paths can safely carry streaming bodies, while unknown paths pass through unchanged unless rewriteRequestForProtocol() receives a body-detected BodyProtocol.rewriteRequestForProtocol() first returns the original Request when mayBeLLMRequest(request.url) is false. Requests already targeting gatewayBase are not rewritten but their headers are reported through observeRequestHeaders(); local-host requests return unchanged. Remote requests use interceptUrl() for known paths or interceptUrlForProtocol() when a protocol was body-detected; absent either rewrite, the original request passes through./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:367-375, rewriteRequestForProtocol() clones via new Request(rewrite.gatewayUrl, request), applies gateway headers using applyGatewayHeaders(), reports the routed headers through observeRequestHeaders(), and returns the routed copy./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:378-390 is ordered as: 1. check whether the outgoing URL matches a known LLM API path; 2. rewrite the URL to the gateway while preserving the path; 3. add X-Lore-Upstream-URL for the base and X-Lore-Upstream-Path for the original endpoint pathname; 4. inject dynamic X-Lore-* context headers from getHeaders(); 5. preserve all original headers, including auth and content type. Installation returns a cleanup function restoring the original globalThis.fetch./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:392-430 uses the process-global key Symbol.for("lore.fetchInterceptor.originalFetch") as ORIGINAL_FETCH_KEY. readOriginalFetchSlot() and writeOriginalFetchSlot() share the original-fetch handle across every bundled or instantiated copy of @loreai/core, including the OpenCode plugin and in-process gateway bundle.Symbol.for(...) slot makes inlining core into the Bun bundle safe; it is unset before installation and reset to null during cleanup.applyGatewayHeaders() in /home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:432-471 is shared by URL-matched Path 1 and body-detected Path 2. It sets x-lore-upstream-url to the resolved upstream base and sets x-lore-upstream-path only when the original pathname starts with /, enabling verbatim forwarding for providers such as GitHub Copilot’s /chat/completions endpoint from issue #1052 rather than synthesizing canonical /v1/... paths.applyGatewayHeaders() may come from either a function or a record and are inserted only when the header is not already present, preserving values set by per-request hooks. Failures are caught and logged as fetch-interceptor: getHeaders() failed: without aborting routing.observeRequestHeaders() invokes optional onRequestHeaders(headers) and isolates callback failures by logging fetch-interceptor: onRequestHeaders() failed: rather than failing the request.installFetchInterceptor(config) in /home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:485-503 refuses a second installation across all module copies when readOriginalFetchSlot() !== null, returning a no-op cleanup. On first installation it captures globalThis.fetch, writes it to the shared slot, and pre-parses config.gatewayBase once into gateway./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:505-552 calls originalFetch(input, init) without URL parsing when mayBeLLMRequest(url) is false. Invalid URLs also pass through. Local URLs pass through unless they already target the gateway, allowing direct-gateway request-header observation while preventing local rerouting.installFetchInterceptor() computes pathMatches = matchesLLMApiPath(upstream.pathname) and pathLooksLLM = pathLooksLLMLike(upstream.pathname). It extracts a body string only when the path does not match but looks LLM-like, then calls detectProtocolFromBody(bodyRaw). A request not targeting the gateway, with neither a known path nor a detected protocol, always passes through.${upstream.host}${upstream.pathname} using the process-local warnedPaths set. The exact warning is fetch-interceptor: ${upstream.host}${upstream.pathname} matched no LLM API pattern — request bypassing Lore gateway. Add a pattern in fetch-interceptor.ts if this is an LLM endpoint./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:554-575 preserves an existing Request when init === undefined; otherwise it creates new Request(input, init). It invokes rewriteRequestForProtocol() with config.getHeaders, config.onRequestHeaders, and detected ?? undefined; unchanged requests use the original input, while routed requests log either → gateway or → gateway (body-detected ${detected}).Request, it calls originalFetch(routed); otherwise it calls originalFetch(routed.url, { ...init, headers: routed.headers })./home/byk/Code/opencode-lore-v2/packages/core/src/fetch-interceptor.ts:577-586 patches fetch with globalThis.fetch = Object.assign(interceptor, originalFetch) so extra properties such as newer Node.js preconnect remain available. Cleanup restores globalThis.fetch = originalFetch and releases the cross-copy guard with writeOriginalFetchSlot(null).