Distillation

2026-09-09

🟡 (09:50) [requested-implementation] User asked to work in the isolated jj workspace /home/byk/Code/opencode-lore-v2 and implement only the core shared Request rewrite primitive plus tests.

🔴 (09:50) User specified the repository must be mutated with jj, not Git, because /home/byk/Code/opencode-lore-v2 contains .jj/ (and is colocated with .git/).

🟡 (09:50) User requested refactoring packages/core/src/fetch-interceptor.ts to add a new exported pure async function accepting a web Request, gatewayBase, dynamic headers, and an optional header observer.

🟡 (09:50) User required the new rewrite function to return the exact same Request unchanged for bypasses, or a new gateway-routed Request while preserving method, body, authentication headers, and the full original pathname/query behavior.

🟡 (09:50) User required existing installFetchInterceptor() to delegate to the same core rewrite logic without regressions.

🔴 (09:50) User specified deterministic test coverage must include V2-style Request bodies, authentication, exact x-lore-upstream-url, exact x-lore-upstream-path, local-host bypass, gateway bypass, streaming body handling, and bypass object identity where reasonable.

🔴 (09:50) User prohibited touching packages/opencode or package manifests for this task.

🔴 (09:50) User required edits to be made with apply_patch.

🔴 (09:50) User required focused tests and the core package typecheck to be run.

🔴 (09:50) User required the final report to include changed files, key design, commands/results, and unresolved issues.

🔴 (09:50) User required repository formatting to remain at 2 spaces, overriding their global tab preference because the formatter configuration requires 2 spaces.

🟡 (09:51) Assistant stated the plan: inspect the isolated workspace, current jj change, interceptor, and tests; add fail-first coverage; implement the shared rewrite function; then run only core package checks.

🔴 (09:51) User supplied jj workflow rules: never use interactive flags such as -i/--interactive; always use -m "msg" for describe/commit operations; verify mutations with jj st and jj log; prefer stable letter-based change IDs over hexadecimal commit IDs; never rebase or describe immutable commits; and use jj undo or jj op restore <op-id> for recovery.

🔴 (09:51) User stated jj’s working copy is itself commit @, file edits automatically amend @, and there is no staging area.

🔴 (09:51) User stated jj bookmarks do not auto-advance; after jj commit -m "...", content is in @-, @ is a new empty change, and an existing bookmark must be moved with jj bookmark set <name> -r @-.

🔴 (09:51) User stated “jj never fails on conflict”; operations record conflicts in the resulting commit, so after rebase, new, or squash, run jj st, resolve markers manually, and do not use interactive jj resolve.

🔴 (09:51) User specified Symbol.for(...)-style process-global behavior is relevant to safe cross-copy interception: jj guidance itself emphasizes checking mutations and avoiding unsupported Git mutation commands in colocated repositories.

🔴 (09:52) Workspace status showed pre-existing modifications to packages/opencode/package.json and pnpm-lock.yaml; these belong to working-copy change wlpqmtos / commit dc5a73d3a215, described as feat(opencode): add V2 server plugin.

🔴 (09:52) The parent commit was change uutomtup / commit 429114122aa1, described as fix(gateway): preserve large recall continuations (#1730) on main.

🔴 (09:52) Repository instructions in /home/byk/Code/opencode-lore-v2/AGENTS.md require every non-trivial PR to receive an adversarial correctness review before merge, following quality/REVIEW.md and its regression-test discipline, adversarial-order state setup, fan-out registry coverage, recurring bug-class batteries, and two-reviewer rule.

🔴 (09:52) The project runtime is Node.js >= 22.5; it is a TypeScript pnpm-workspace monorepo using SQLite in WAL mode with FTS5, with normal persistent storage at ~/.local/share/lore/lore.db.

🔴 (09:52) Tests use a temporary SQLite database via packages/core/test/setup.ts, never the production DB.

🔴 (09:52) Releases use Sentry Craft through GitHub Actions; never manually bump versions or edit CHANGELOG.md, because Craft handles both automatically.

🔴 (09:52) Release commands documented by the repository are gh workflow run release.yml -f version=auto or an explicit version such as gh workflow run release.yml -f version=0.23.0; the workflow runs scripts/bump-version.sh, generates the changelog, creates release/X.Y.Z, runs CI artifacts, opens a Craft publish issue, and publishes after the accepted label.

🔴 (09:52) packages/core/src/fetch-interceptor.ts currently defines FetchInterceptorConfig with gatewayBase: string, getHeaders: () => Record<string, string>, and optional onRequestHeaders?: (headers: Headers) => void.

🔴 (09:52) Existing LLM URL matching in packages/core/src/fetch-interceptor.ts recognizes /v1/{messages,chat/completions,responses}, /api/v1/..., /api/..., /(openai|anthropic)/v1/..., and /codex/responses, each permitting trailing path segments where configured.

🔴 (09:52) Existing non-standard rewrite behavior maps "/codex/responses" to "/v1/codex/responses" through NON_STANDARD_PATH_REWRITES.

🔴 (09:52) Existing protocol routing uses BodyProtocol = "anthropic" | "openai" | "openai-responses" and maps them respectively to /v1/messages, /v1/chat/completions, and /v1/responses.

🔴 (09:52) Existing endpoint-suffix matching is ordered longest-first as: 1. /chat/completions, 2. /codex/responses, 3. /responses, 4. /messages.

🔴 (09:52) Existing extractBodyString() only reads bodies available synchronously from RequestInit: strings, ArrayBuffer, and typed-array views decoded with TextDecoder; it deliberately does not consume ReadableStream bodies or bodies only present on a Request.

🔴 (09:52) Existing detectProtocolFromBody() requires parsed JSON to be a non-null object with model; it detects OpenAI Responses first via array input, max_output_tokens, or previous_response_id; Anthropic via top-level system plus array messages; and OpenAI Chat as the fallback for array messages.

🔴 (09:52) User stated OpenAI Chat never has a top-level system — it embeds system messages inside the messages array.

🔴 (09:52) Existing Rewrite contains gatewayUrl, upstreamBase, and upstreamPath; upstreamPath is the client’s full original endpoint pathname so the gateway can reconstruct origin(base) + pathname, including providers that omit /v1 or use non-standard prefixes.

🔴 (09:52) Existing interceptUrl() first finds the final /v1/, routes ${gateway.origin}${original pathname from /v1/}${original search}, sets the upstream base to the origin plus the prefix preceding /v1/, and preserves the full original pathname as upstreamPath; otherwise it applies NON_STANDARD_PATH_REWRITES.

🔴 (09:52) Existing interceptUrlForProtocol() chooses the canonical gateway endpoint from PROTOCOL_GATEWAY_PATHS, preserves upstream.search, strips the first matching known endpoint suffix to derive upstreamBase, and preserves the original full pathname in upstreamPath.

🔴 (09:52) Existing shouldIntercept(url, gatewayBase) never intercepts requests already going to the gateway, local requests, or non-LLM API paths.

🔴 (09:52) Existing local bypass hosts are exactly localhost, 127.0.0.1, 0.0.0.0, ::1, and [::1].

🔴 (09:52) Existing buildGatewayHeaders() preserves original request/init headers, sets x-lore-upstream-url to the derived upstream base, sets x-lore-upstream-path when the original path starts with /, and injects dynamic headers from config.getHeaders() only when each header is not already present.

🔴 (09:52) Existing fetch interception uses process-global key Symbol.for("lore.fetchInterceptor.originalFetch") to share the original fetch handle across multiple bundled copies of @loreai/core; this prevents stacked interceptors and the infinite-loop shape gateway → interceptor → gateway.

🔴 (09:52) The process-global original-fetch slot is unset until installFetchInterceptor() runs and is reset to null by cleanup.

Distillation

Observations

2026-09-09