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7636a06b-38f0-4d97-aca5-35f56c360a15["lore_tm_v1_xJgv6mlNBYkM9ozQOv6dq6n0twfT1IRaHPlfuEyDYQE"]
buildGatewayHeaders() so header handling can “never drift between them.”/home/byk/Code/opencode-lore/packages/core/src/fetch-interceptor.ts, requests whose URL starts with gatewayBase are passed to originalFetch; their headers are still sent to observeRequestHeaders() so in-process extensions can scope side-channel requests./home/byk/Code/opencode-lore/packages/core/src/fetch-interceptor.ts bypasses interception for hosts localhost, 127.0.0.1, 0.0.0.0, ::1, and [::1].buildGatewayHeaders() in /home/byk/Code/opencode-lore/packages/core/src/fetch-interceptor.ts preserves headers from either init.headers or a Request input; sets x-lore-upstream-url to the resolved upstream base; conditionally sets x-lore-upstream-path when the original pathname starts with /; and injects values from config.getHeaders() only when the header is not already present.buildGatewayHeaders() catches failures from config.getHeaders() and logs fetch-interceptor: getHeaders() failed: without aborting the request.observeRequestHeaders() calls optional config.onRequestHeaders(headers) and catches callback failures, logging fetch-interceptor: onRequestHeaders() failed:.installFetchInterceptor() pre-parses config.gatewayBase into gateway: URL once and retains gatewayBase to avoid constructing a new gateway URL object for every process-wide fetch call./messages, /completions, or /responses; malformed URLs also pass directly to originalFetch(input, init)./home/byk/Code/opencode-lore/packages/core/src/fetch-interceptor.ts: when matchesLLMApiPath(upstream.pathname) succeeds, interceptUrl(upstream, gateway) supplies upstreamBase, upstreamPath, and gatewayUrl; the interceptor builds and observes gateway headers, logs ${upstream.host}${upstream.pathname} → gateway, and calls originalFetch(rewrite.gatewayUrl, { ...init, headers }). A missing rewrite is treated as an unexpected condition and safely passed through./home/byk/Code/opencode-lore/packages/core/src/fetch-interceptor.ts: for a truthy host and pathLooksLLMLike(upstream.pathname), it obtains the body via extractBodyString(input, init), detects a protocol with detectProtocolFromBody(bodyRaw), and uses interceptUrlForProtocol(upstream, gateway, detected) to route non-standard URLs to that protocol’s canonical gateway endpoint while preserving the original upstream path in headers.${upstream.host}${upstream.pathname} → gateway (body-detected ${detected}), observes the constructed headers, and forwards through originalFetch(rewrite.gatewayUrl, { ...init, headers }).${upstream.host}${upstream.pathname} via warnedPaths; the warning advises adding a pattern in fetch-interceptor.ts if it is an LLM endpoint.x-lore-upstream-path, supporting providers whose endpoints omit /v1—specifically GitHub Copilot’s /chat/completions from issue #1052—or use non-standard prefixes.