fix: surface a clear error on non-JSON API responses instead of crashing - #1093
fix: surface a clear error on non-JSON API responses instead of crashing#1093ralphstodomingo wants to merge 12 commits into
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📝 WalkthroughWalkthroughThe SDK build script now validates generated-client patches and limits parse-error bodies to markup responses. CI verifies regeneration and drift. The v2 interceptor normalizes HTML content types. Tests cover generated-client alignment and live response parsing. ChangesSDK JSON response guards
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The SDK now reports actionable errors for non-JSON API responses instead of crashing. A CI check still validates only the v2 generated output, so changes in the v1 generated tree could escape drift detection and be overwritten; the PR is otherwise mergeable with owner awareness and follow-up. Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Full details: Description checkExplanation The description explains the issue, root cause, implementation, scope, rationale, verification results, and known build limitation. It omits the template's Type of change and Checklist sections, but the core required information is present and the description is mostly complete. Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 3 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Verified via E2E repro (Bun)Drove the actual Before — unpatched client on The exact string from telemetry. The JavaScriptCore phrasing confirms it runs in the Bun CLI (not the Node extension), and the throw pins the crash to the JSON success-path parse in After — this PR: Control — valid JSON 200 against the patched client: parses fine ( |
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Re-verified after the review round: both hunks now wrapped in |
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Pull request overview
This PR hardens the generated JavaScript SDK clients to handle non-JSON bodies on successful (2xx) responses by converting raw JSON parse crashes into an actionable error that calls out the received Content-Type and HTTP status.
Changes:
- Add a guarded
JSON.parseon the success path for the v2 generated client when parsing JSON fromresponse.text(). - Split
"json"out of the v1 client’s fall-through parse switch so JSON parsing can be guarded without affecting otherparseAsmodes.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| packages/sdk/js/src/v2/gen/client/client.gen.ts | Wraps JSON parsing in a try/catch on 2xx responses to replace raw parse crashes with a clearer error. |
| packages/sdk/js/src/gen/client/client.gen.ts | Separates "json" parsing from the generic response[parseAs]() path to guard JSON parse failures while keeping other parse modes unchanged. |
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Code Review SummaryStatus: No Issues Found | Recommendation: Merge Files Reviewed (2 files)
Previous Review Summaries (11 snapshots, latest commit 8f12363)Current summary above is authoritative. Previous snapshots are kept for context only. Previous review (commit 8f12363)Status: No Issues Found | Recommendation: Merge Files Reviewed (2 files)
Previous review (commit dfb4376)Status: No Issues Found | Recommendation: Merge Files Reviewed (7 files)
Previous review (commit bcb8d15)Status: No Issues Found | Recommendation: Merge Files Reviewed (4 files)
Previous review (commit 21f6529)Status: 1 Issue Found | Recommendation: Address before merge Overview
Issue Details (click to expand)SUGGESTION
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Reviewed by deepseek-v4-pro · Input: 62.8K · Output: 22.9K · Cached: 505.2K Review guidance: REVIEW.md from base branch |
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Review summary
Verdict: request changes. One blocking issue, one coverage gap, one missing test. Details on the first three are inline.
The diagnosis is right and the implementation is careful in the places that matter. Reading the body outside the try is the non-obvious call and it's the correct one — a socket reset or abort mid-read keeps its own error identity instead of getting mislabeled a proxy error page, and the inline comment says why. { cause } preserves the original SyntaxError, lib: ["es2022"] in packages/sdk/js/tsconfig.json makes the two-arg Error constructor typecheck, and splitting "json" out of the v1 fall-through is mechanically clean — arrayBuffer/blob/formData/text still dispatch through response[parseAs]() and parseAs resolution is unchanged. The marker format is right too (balanced, upstream_fix: prefix, no redundant nesting).
Major: no regression test
packages/sdk/js has no test suite, but the SDK is exercised from packages/opencode/test/server/ — sdk-error-shape.test.ts, sdk-v1-smoke.test.ts, httpapi-sdk.test.ts all build a client with an injected fetch, which makes faking this a ten-liner:
const sdk = createOpencodeClient({
baseUrl: "http://test",
fetch: (async () =>
new Response("<!DOCTYPE html><html>502</html>", {
status: 200,
headers: { "content-type": "application/json" },
})) as unknown as typeof fetch,
})
await expect(sdk.session.list()).rejects.toThrow(/not JSON/)Two reasons this is more than a box-tick. First, a test is the only mechanism that catches the regeneration wipe. Second, the trigger is counter-intuitive: the instinct is to return Content-Type: text/html, which never reaches the guard — the test has to use application/json with an HTML body. That subtlety belongs in a committed test rather than a PR description. The E2E matrix in the description is real work; it just isn't running anywhere.
REVIEW.md is explicit that CI here covers types and marker presence, not runtime behavior.
Minor
- The throw bypasses
interceptors.errorand thethrowOnError: falsecontract. Both wrappers registerclient.interceptors.error.use(wrapClientError), and those run only on the non-ok branch. A success-paththrowskips them — including any consumer-registered telemetry hook — and escapes regardless ofthrowOnError: false, which otherwise promises a{ data, error }tuple. This is not a regression:JSON.parse(text)threw a rawSyntaxErrorfrom the identical position before, so no caller ever got a result tuple for this failure class. But this was the natural moment to route it through the normal error path, and that's also why this error class is invisible towrapClientError. causeshape diverges from the error-path convention.error-interceptor.ts:31,35,41attachescause: { body, status }; this attaches the rawSyntaxError. Defensible — different failure classes — and the inline suggestion on the message resolves it incidentally.
Nits
gen/client/client.gen.ts:132uses"content-type"; line 110 in the same function uses"Content-Type".Headers.getis case-insensitive so it works, but pick one.- Twelve byte-identical lines across the two clients. A
parseJsonOrThrow(text, request, response)helper inpackages/sdk/js/src/—error-interceptor.tsis the precedent for shared non-generated client logic — would shrink the fork delta to two one-line calls and compose cleanly with the post-gen patch. - The v1 comment runs six lines to v2's three for identical logic.
Test matrix worth committing
- 200 +
application/json+ HTML body → actionable error,causeis aSyntaxError. v1 and v2. (the shipped bug) - 200 +
text/html; charset=utf-8+ HTML body → currently returns a string asdata. - 200 + no
Content-Type+ HTML body → currently returns a stream asdata. - v1 chunked 200, empty body, no
Content-Length→ asserts the new{}rather than the old throw. - 200 +
application/json+ valid JSON, and valid JSON under a wrong content-type → guard must not fire. responseValidator/responseTransformerstill run after a successful parse (v1 regression guard).- Body-read failure mid-stream still surfaces the socket error, not the proxy message — pins the outside-the-
tryplacement against future edits. - Codegen idempotence: run
packages/sdk/js/script/build.ts, assert the guard survives.
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The release-build problem is genuinely fixed, and worth confirming explicitly since it was the blocking one. I checked it three ways rather than relying on the description:
jsonGuardNeedleis byte-identical to line 190 of the pinned@hey-api/openapi-ts@0.90.10fetch template — ten leading spaces, trailing semicolon, and exactly one occurrence in the file. The trailing-semicolon detail was the right catch; it is precisely what would have made this fail silently.- A full
script/build.tsrun against a clean checkout wipessrc/v2/genand lands the guard in the regenerated, prettified output.request,textandresponseare all in scope at the injection point, andbun tscatbuild.ts:94compiles the result before publish. bun test test/sdk-json-guard.test.tspasses 4/4.
Also confirmed: the interceptor normalization is correct and runs at client.gen.ts:118, before parseAs resolution at :130, so it fires regardless of parse mode — which is why the honestly-labeled text/html case is now covered end to end. Leaving stream and blob uncovered and saying so in the description is the right call. And the body read staying outside the guard, so socket resets keep their own error identity, survived this rewrite rather than being lost in it.
Four inline comments above. The rest:
No CI job runs the SDK build. The only script/build.ts invocations in the workflows are packages/opencode/script/build.ts (ci.yml:502, release.yml:92) — the binary build. packages/sdk/js/script/build.ts first executes inside script/publish.ts:28. The loud throw is the right failure mode but fires at the worst moment. The exact version pin bounds this to dependency-bump PRs, which is precisely the PR that goes green and then breaks the next release. The reproducible-codegen step in the second inline comment fixes this and the drift-detection gap together.
cause is no longer an Error. 15a452ae4 attached the SyntaxError directly as cause; this commit nests it as cause.parseError. So err.cause instanceof SyntaxError now fails, and default cause-chain printing no longer surfaces the parse detail on its own. Matching error-interceptor.ts's { body, status } shape is defensible — the new shape is a superset — but the earlier thread was resolved on the old behavior, so this is worth a line there rather than a silent change.
Nits
packages/sdk/js/src/gen/client/client.gen.tsnow spells the same concept three ways in one function:Content-Length(:100),Content-Type(:111),content-type(:135).Headers.getis case-insensitive, so purely cosmetic.- The guard body now exists in three places — v1's file, v2's committed file, and the string array in
build.ts. The second inline comment is what that already cost on day one. sdk-json-guard.test.ts:63asserts onlycause.body;cause.parseError,cause.statusand the 200-char truncation could all go missing undetected.sdk-json-guard.test.ts:73—expect(String(err)).toContain("text/html")does correctly isolate the interceptor (that route resolvesparseAsto"text", so the guard cannot fire on it, and removing the normalization makeserrnull). Exact-message matching would additionally pin the message contract, but nothing is broken as written.- The open automated-review comment on
sdk-json-guard.test.ts:12is worth taking. It is framed as Windows-only, but the percent-encoding half bites anywhere: a checkout under a directory containing a space resolves to%20andBun.filecannot open it, so the canary throws instead of asserting.
Still untested
- v1: mislabeled
application/json+ HTML body. - v1:
parseAs: "text"round-trip. - v1: chunked-empty 200 →
{}. - Reproducible codegen: build, then
git diff --exit-code src/v2/gen. - Interceptor:
TEXT/HTMLandtext/html ; charset=utf-8— the normalization handles both, nothing pins it. cause.parseError/cause.statuspresence and the body truncation.
Nothing here is blocking.
Review summaryVerdict: request changes. The runtime guard is correct, and the earlier rounds genuinely resolved what they claimed to — body read outside the guard, Four findings are posted inline ( MAJOR — v1 has no
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…arkup; honest codegen check Review round 3: - build.ts: `patchOnce` — String.replace patches the first match only, so both the SseFn and JSON-guard patches now fail the build on zero OR many sites; the template canary in the test asserts an exact count too - the response body rides on `cause` only when it looks like markup: util/error.ts serializes `cause` into logs, and a truncated or malformed real JSON response must not put its first 200 characters there (build.ts template + both generated clients; live test drives a sentinel secret through errorData for v1 and v2) - CI "SDK codegen is reproducible": cleanup is an unconditional EXIT trap covering src/gen, src/v2/gen (tracked and untracked), dist and openapi.json; the asserted file is removed before the build so an early codegen failure can no longer pass on the committed copy; a non-zero build is tolerated only when the file was regenerated AND round-trips — tsc on the regenerated tree fails until #1148, which the step records; drop the tolerance with it Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GayJFsfg2q2FoAG2XSVsZF
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Round 3 addressed in e6d0732 — 4/4 threads replied and resolved above.
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Inline comments:
In @.github/workflows/ci.yml:
- Line 145: Update the generated-output drift check in the CI step around
drift_rc so it validates both src/gen and src/v2/gen, including tracked
modifications and untracked files, before allowing the job to pass. Preserve the
existing failure-status handling and ensure cleanup cannot remove generated
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…ilure by signature - a proxy/gateway page can echo the request URL, query included — only its <title> rides on cause now (all three copies); live test with an echoing Express-style page for v1 and v2 - the codegen CI step tolerates a non-zero build only when the log carries the "tsc" exited with code signature (#1148) — any earlier failure exits with the build's status; the drift check is also cleaned of build.log Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GayJFsfg2q2FoAG2XSVsZF
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….body A proxy/CDN page can render the request path and query inside its <title>; a title carrying any of / ? = % is dropped (a gateway title never has them). Live fixtures with raw and percent-encoded echoed titles for v1 and v2. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GayJFsfg2q2FoAG2XSVsZF
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Review summary
Verdict: request changes. One MAJOR with a cheap, mechanical fix; nothing blocking on principle. Everything from the earlier rounds still holds at bcb8d151 — I re-checked the release-build guard, cause preservation, v2 content-type normalization, v1 live coverage, and the query-string leak fix, no regressions. This round is scoped to the two commits that landed after the last reply here and hadn't been looked at yet: 21f6529e and bcb8d151.
MAJOR — the CI tsc-failure whitelist matches by command name only, not the specific #1148 diagnostic
.github/workflows/ci.yml, "SDK codegen is reproducible" step:
if grep -q '"tsc" exited with code' build.log; then
echo "::warning::build.ts exited $build_rc at tsc on the regenerated tree (#1148); codegen+patch asserted above"
else
echo "::error::build.ts exited $build_rc before tsc — not the whitelisted #1148 failure"
exit "$build_rc"
fiI ran bun script/build.ts against this checkout with Bun 1.3.14 (the version this workflow pins) rather than take the comment at face value. The real, current #1148 failure is:
src/v2/client.ts(2,15): error TS2305: Module '"./gen/types.gen.js"' has no exported member 'FileSystemEntry'.
error: "tsc" exited with code 2
The grep does correctly fire for this, and it's scoped to the invoked command name specifically — a failing bun prettier step produces error: "prettier" exited with code N, which this pattern doesn't match, so an earlier-stage failure still correctly hard-fails. The drift check stays correctly scoped too: client.gen.ts round-trips byte-for-byte; only sdk.gen.ts/types.gen.ts (not covered by the drift check, already known not to round-trip on main) differ.
What it doesn't do is verify which tsc failure it caught — it matches "tsc exited nonzero," full stop. A future PR that introduces a genuinely new TypeScript regression in the regenerated SDK types would be silently whitelisted too, as long as the failure still surfaces inside the tsc stage.
Suggestion: match on content, not just on which command failed. grep -q 'TS2305.*FileSystemEntry' build.log is a start, but on its own it still passes if that diagnostic shows up alongside new, unrelated error TS… lines — a plain grep -q only checks presence, not exclusivity. Extract all error TS… lines from the log and assert the set is exactly the known one (or have build.ts itself emit a stable marker like SDK_CODEGEN_EXPECTED_FAILURE: FileSystemEntry (#1148) and match on that, rather than re-deriving a TypeScript message that could reformat on a compiler bump).
MINOR — the title-echo drop heuristic is a punctuation filter, not an echo check
packages/sdk/js/src/gen/client/client.gen.ts, packages/sdk/js/src/v2/gen/client/client.gen.ts, packages/sdk/js/script/build.ts (jsonGuardBlock template)
The comment says "a title that echoes the request target is dropped," but the actual check (!/[\/?=%]/.test(title)) only rejects titles containing / ? = %. Verified against the real guard logic — both of these leak straight into cause.body, which gets serialized into logs:
<title>Cannot GET SECRET_TOKEN</title> -> body: "Cannot GET SECRET_TOKEN"
<title>Not found: /api?token=SECRET_TOKEN</title> -> body: "Not found: /api?token=SECRET_TOKEN" (HTML-entity-encoded)
I'm rating this MINOR rather than higher because the filter's actual goal is narrower than "prevent all page-title data from reaching logs" — it's "prevent the request URL from echoing through," and / ? = % are exactly the characters that define URL syntax, so it does achieve that narrower goal. No current call site through this path passes anything more sensitive than directory=<cwd>, which the filter does catch. The gap only matters if a proxy/gateway ever puts something else sensitive in a title, or deliberately HTML-entity-encodes a URL to dodge the filter — a stricter threat model than what this PR set out to cover. Still worth tightening given the intent stated in the comment is broader than what's implemented.
Suggestion: either narrow the comment to state the actual guarantee ("drops titles containing URL-syntax characters," not "drops titles that echo the request"), or compare the title against the decoded request path/query components for a closer match to the stated intent.
Missing tests
- A title containing a leaked value without
/ ? = %(theSECRET_TOKENcase above) — pins the MINOR finding's actual behavior either way it's resolved. - Empty (
<title></title>), unclosed, and multi-line<title>tags — current behavior (title undefined) is the safe default, but nothing pins it. - A test asserting the CI whitelist rejects a log where the known diagnostic appears alongside an unrelated new one — closes the exclusivity gap in the MAJOR finding above.
Positive observations
patchOnce(build.ts) turning "did the string change?" into "did it match exactly once?" is a real improvement — fails loud on 0 or 2+ sites instead of silently patching the wrong occurrence or no-opping.- The new fixtures (
echo-page,echo-title,echo-title-encoded) drive real HTTP responses through the real client rather than mocking the parse function, consistent with the rest of this test file. - Scoping the CI drift check to
client.gen.tsonly (not the wholesrc/v2/gentree) is the right call giventypes.gen.ts/sdk.gen.tsare already known not to round-trip onmain— confirmed by actually running the build and seeing exactly that split. - Good defense-in-depth structure: pathname-only request identity, title-only
cause.body, and the (imperfect but present) echo filter on top of that.
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Review summary
Verdict: request changes. One MAJOR with a cheap, mechanical fix; nothing blocking on principle. Everything from the earlier rounds still holds at bcb8d151 — I re-checked the release-build guard, cause preservation, v2 content-type normalization, v1 live coverage, and the query-string leak fix, no regressions. This round is scoped to the two commits that landed after the last reply here and hadn't been looked at yet: 21f6529e and bcb8d151.
MAJOR — the CI tsc-failure whitelist matches by command name only, not the specific #1148 diagnostic
.github/workflows/ci.yml, "SDK codegen is reproducible" step:
if grep -q '"tsc" exited with code' build.log; then
echo "::warning::build.ts exited $build_rc at tsc on the regenerated tree (#1148); codegen+patch asserted above"
else
echo "::error::build.ts exited $build_rc before tsc — not the whitelisted #1148 failure"
exit "$build_rc"
fiI ran bun script/build.ts against this checkout with Bun 1.3.14 (the version this workflow pins) rather than take the comment at face value. The real, current #1148 failure is:
src/v2/client.ts(2,15): error TS2305: Module '"./gen/types.gen.js"' has no exported member 'FileSystemEntry'.
error: "tsc" exited with code 2
The grep does correctly fire for this, and it's scoped to the invoked command name specifically — a failing bun prettier step produces error: "prettier" exited with code N, which this pattern doesn't match, so an earlier-stage failure still correctly hard-fails. The drift check stays correctly scoped too: client.gen.ts round-trips byte-for-byte; only sdk.gen.ts/types.gen.ts (not covered by the drift check, already known not to round-trip on main) differ.
What it doesn't do is verify which tsc failure it caught — it matches "tsc exited nonzero," full stop. A future PR that introduces a genuinely new TypeScript regression in the regenerated SDK types would be silently whitelisted too, as long as the failure still surfaces inside the tsc stage.
Suggestion: match on content, not just on which command failed. grep -q 'TS2305.*FileSystemEntry' build.log is a start, but on its own it still passes if that diagnostic shows up alongside new, unrelated error TS… lines — a plain grep -q only checks presence, not exclusivity. Extract all error TS… lines from the log and assert the set is exactly the known one (or have build.ts itself emit a stable marker like SDK_CODEGEN_EXPECTED_FAILURE: FileSystemEntry (#1148) and match on that, rather than re-deriving a TypeScript message that could reformat on a compiler bump).
MINOR — the title-echo drop heuristic is a punctuation filter, not an echo check
packages/sdk/js/src/gen/client/client.gen.ts, packages/sdk/js/src/v2/gen/client/client.gen.ts, packages/sdk/js/script/build.ts (jsonGuardBlock template)
The comment says "a title that echoes the request target is dropped," but the actual check (!/[\/?=%]/.test(title)) only rejects titles containing / ? = %. Verified against the real guard logic — both of these leak straight into cause.body, which gets serialized into logs:
<title>Cannot GET SECRET_TOKEN</title> -> body: "Cannot GET SECRET_TOKEN"
<title>Not found: /api?token=SECRET_TOKEN</title> -> body: "Not found: /api?token=SECRET_TOKEN" (HTML-entity-encoded)
I'm rating this MINOR rather than higher because the filter's actual goal is narrower than "prevent all page-title data from reaching logs" — it's "prevent the request URL from echoing through," and / ? = % are exactly the characters that define URL syntax, so it does achieve that narrower goal. No current call site through this path passes anything more sensitive than directory=<cwd>, which the filter does catch. The gap only matters if a proxy/gateway ever puts something else sensitive in a title, or deliberately HTML-entity-encodes a URL to dodge the filter — a stricter threat model than what this PR set out to cover. Still worth tightening given the intent stated in the comment is broader than what's implemented.
Suggestion: either narrow the comment to state the actual guarantee ("drops titles containing URL-syntax characters," not "drops titles that echo the request"), or compare the title against the decoded request path/query components for a closer match to the stated intent.
Missing tests
- A title containing a leaked value without
/ ? = %(theSECRET_TOKENcase above) — pins the MINOR finding's actual behavior either way it's resolved. - Empty (
<title></title>), unclosed, and multi-line<title>tags — current behavior (title undefined) is the safe default, but nothing pins it. - A test asserting the CI whitelist rejects a log where the known diagnostic appears alongside an unrelated new one — closes the exclusivity gap in the MAJOR finding above.
Positive observations
patchOnce(build.ts) turning "did the string change?" into "did it match exactly once?" is a real improvement — fails loud on 0 or 2+ sites instead of silently patching the wrong occurrence or no-opping.- The new fixtures (
echo-page,echo-title,echo-title-encoded) drive real HTTP responses through the real client rather than mocking the parse function, consistent with the rest of this test file. - Scoping the CI drift check to
client.gen.tsonly (not the wholesrc/v2/gentree) is the right call giventypes.gen.ts/sdk.gen.tsare already known not to round-trip onmain— confirmed by actually running the build and seeing exactly that split. - Good defense-in-depth structure: pathname-only request identity, title-only
cause.body, and the (imperfect but present) echo filter on top of that.
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Review summary
Verdict: request changes. One MAJOR with a cheap, mechanical fix; nothing blocking on principle. Everything from the earlier rounds still holds at bcb8d151 — I re-checked the release-build guard, cause preservation, v2 content-type normalization, v1 live coverage, and the query-string leak fix, no regressions. This round is scoped to the two commits that landed after the last reply here and hadn't been looked at yet: 21f6529e and bcb8d151.
MAJOR — the CI tsc-failure whitelist matches by command name only, not the specific #1148 diagnostic
.github/workflows/ci.yml, "SDK codegen is reproducible" step:
if grep -q '"tsc" exited with code' build.log; then
echo "::warning::build.ts exited $build_rc at tsc on the regenerated tree (#1148); codegen+patch asserted above"
else
echo "::error::build.ts exited $build_rc before tsc — not the whitelisted #1148 failure"
exit "$build_rc"
fiI ran bun script/build.ts against this checkout with Bun 1.3.14 (the version this workflow pins) rather than take the comment at face value. The real, current #1148 failure is:
src/v2/client.ts(2,15): error TS2305: Module '"./gen/types.gen.js"' has no exported member 'FileSystemEntry'.
error: "tsc" exited with code 2
The grep does correctly fire for this, and it's scoped to the invoked command name specifically — a failing bun prettier step produces error: "prettier" exited with code N, which this pattern doesn't match, so an earlier-stage failure still correctly hard-fails. The drift check stays correctly scoped too: client.gen.ts round-trips byte-for-byte; only sdk.gen.ts/types.gen.ts (not covered by the drift check, already known not to round-trip on main) differ.
What it doesn't do is verify which tsc failure it caught — it matches "tsc exited nonzero," full stop. A future PR that introduces a genuinely new TypeScript regression in the regenerated SDK types would be silently whitelisted too, as long as the failure still surfaces inside the tsc stage.
Suggestion: match on content, not just on which command failed. grep -q 'TS2305.*FileSystemEntry' build.log is a start, but on its own it still passes if that diagnostic shows up alongside new, unrelated error TS… lines — a plain grep -q only checks presence, not exclusivity. Extract all error TS… lines from the log and assert the set is exactly the known one (or have build.ts itself emit a stable marker like SDK_CODEGEN_EXPECTED_FAILURE: FileSystemEntry (#1148) and match on that, rather than re-deriving a TypeScript message that could reformat on a compiler bump).
MINOR — the title-echo drop heuristic is a punctuation filter, not an echo check
packages/sdk/js/src/gen/client/client.gen.ts, packages/sdk/js/src/v2/gen/client/client.gen.ts, packages/sdk/js/script/build.ts (jsonGuardBlock template)
The comment says "a title that echoes the request target is dropped," but the actual check (!/[\/?=%]/.test(title)) only rejects titles containing / ? = %. Verified against the real guard logic — both of these leak straight into cause.body, which gets serialized into logs:
<title>Cannot GET SECRET_TOKEN</title> -> body: "Cannot GET SECRET_TOKEN"
<title>Not found: /api?token=SECRET_TOKEN</title> -> body: "Not found: /api?token=SECRET_TOKEN" (HTML-entity-encoded)
I'm rating this MINOR rather than higher because the filter's actual goal is narrower than "prevent all page-title data from reaching logs" — it's "prevent the request URL from echoing through," and / ? = % are exactly the characters that define URL syntax, so it does achieve that narrower goal. No current call site through this path passes anything more sensitive than directory=<cwd>, which the filter does catch. The gap only matters if a proxy/gateway ever puts something else sensitive in a title, or deliberately HTML-entity-encodes a URL to dodge the filter — a stricter threat model than what this PR set out to cover. Still worth tightening given the intent stated in the comment is broader than what's implemented.
Suggestion: either narrow the comment to state the actual guarantee ("drops titles containing URL-syntax characters," not "drops titles that echo the request"), or compare the title against the decoded request path/query components for a closer match to the stated intent.
Missing tests
- A title containing a leaked value without
/ ? = %(theSECRET_TOKENcase above) — pins the MINOR finding's actual behavior either way it's resolved. - Empty (
<title></title>), unclosed, and multi-line<title>tags — current behavior (title undefined) is the safe default, but nothing pins it. - A test asserting the CI whitelist rejects a log where the known diagnostic appears alongside an unrelated new one — closes the exclusivity gap in the MAJOR finding above.
Positive observations
patchOnce(build.ts) turning "did the string change?" into "did it match exactly once?" is a real improvement — fails loud on 0 or 2+ sites instead of silently patching the wrong occurrence or no-opping.- The new fixtures (
echo-page,echo-title,echo-title-encoded) drive real HTTP responses through the real client rather than mocking the parse function, consistent with the rest of this test file. - Scoping the CI drift check to
client.gen.tsonly (not the wholesrc/v2/gentree) is the right call giventypes.gen.ts/sdk.gen.tsare already known not to round-trip onmain— confirmed by actually running the build and seeing exactly that split. - Good defense-in-depth structure: pathname-only request identity, title-only
cause.body, and the (imperfect but present) echo filter on top of that.
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Formal approval — see the detailed findings in the comment below. Nothing blocking; one MAJOR and one MINOR worth addressing, both with straightforward fixes.
Dismissing — posted in error while debugging a caching issue; superseded by the formal Approve review, with findings posted separately as a comment.
Review summaryVerdict: request changes. One MAJOR with a cheap, mechanical fix; nothing blocking on principle. Everything from the earlier rounds still holds at MAJOR — the CI
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…he title-filter comment The codegen-reproducibility gate matched "tsc exited nonzero" by command name only, so a new TypeScript regression in the regenerated SDK would have been silently whitelisted alongside the known #1148 failure. The gate now runs script/check-known-tsc-failure.sh, which strips file(line,col) prefixes and asserts the diagnostic set is exactly the one known TS2305 FileSystemEntry error — distinct exit codes separate "failed before tsc" from "tsc failed differently", and unit tests drive the script with synthetic logs (known-only, line drift, known+new, different-single, no-diagnostics, non-tsc). The JSON-guard title-filter comment claimed titles "echoing the request target" are dropped; the check is a URL-syntax character filter. The comment (template and both generated copies, in lockstep) now states the actual guarantee, and new tests pin the behavior: a title without URL syntax passes through, empty/unclosed titles contribute nothing, and a multi-line title passes with its newlines. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011AgkYtRZ5cr3w4cUKXVZvt
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@sahrizvi both findings addressed at the new head; thanks for running the build yourself rather than trusting the comment — the MAJOR was exactly right. MAJOR — fixed with exact-set matching, extracted and unit-tested. The gate now runs MINOR — resolved by narrowing the comment to the actual guarantee (your first option): the filter's contract is "the request target cannot echo through", achieved via the URL-syntax character class — the comment now says exactly that, in the template and both generated copies in lockstep. Your missing-tests #1/#2 pin the behavior on both clients: 26/26 across the guard + whitelist suites locally. |
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All reported issues were addressed across 7 files (changes from recent commits).
Tip: Review your code locally with the cubic CLI to iterate faster.
Re-trigger cubic
…scaped too The exact-set whitelist failed on the first real run: build.ts dumps the failing command's stdout as an escaped JSON string, so every diagnostic appears twice in build.log (raw, and indented inside `stdout: "..."`). The extraction now anchors on genuine tsc-emitted lines — column-0 file(line,col) prefix — before stripping locations and comparing, with a test reproducing the real log shape. Also releases the per-test temp directory (cubic). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011AgkYtRZ5cr3w4cUKXVZvt
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@codex review Per the repo's review gate (cubic commented). Scope: the two newest commits — the exact-set tsc-failure whitelist ( |
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…ne,col Stripping the whole file(line,col) prefix let the identical diagnostic text surfacing in a SECOND generated file collapse to one line under sort -u and pass as the known #1148 failure. The filename now stays in the compared set; only line and column are normalized for drift. Test drives the second-file superset to a rejection. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011AgkYtRZ5cr3w4cUKXVZvt
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Verified the three follow-up commits (dfb43769f, 8f12363e0, 8efe84740) by cloning at head, installing deps, and running things for real rather than reading the diff alone:
- Ran the actual
bun script/build.tsand fed the real resulting log throughcheck-known-tsc-failure.sh— correctly whitelisted, including the JSON-echo double-count case. - Manually drove all 7 edge cases in the gate script directly (known-only, line drift, second-file superset, known+new diagnostic, different diagnostic, no-diagnostics, non-tsc failure) — all correct.
- Ran
ci-tsc-whitelist.test.ts(8/8) andsdk-json-guard.test.ts(20/20) for real. - Confirmed the title-filter logic is unchanged and only the comment was corrected, in lockstep across all three copies (v1, v2, build.ts template).
Both findings from the last round are genuinely resolved. Approving.
Closes #1119
What
When a proxy / gateway / CDN returns an HTTP 200 with an HTML body (an error or interstitial page) instead of JSON, the generated SDK client crashes with a raw
JSON Parse error: Unrecognized token '<'.parseAsfalls back to"json"(?? "json") wheneverContent-Typeis missing or unrecognized, so a non-JSON body reaches the parser. The error response path was already guarded; the success path was not.Fix
Guard the JSON parse in the success path of both generated clients. On a parse failure, throw an actionable error naming the received content-type + HTTP status ("…usually a proxy or gateway error page, not the API") instead of the raw parse crash.
packages/sdk/js/src/v2/gen/client/client.gen.ts— the client the CLI imports (@opencode-ai/sdk/v2)packages/sdk/js/src/gen/client/client.gen.ts— v1:jsonis split out of the shared fall-through group soarrayBuffer/blob/formData/textkeep dispatching viaresponse[parseAs]()Both hunks are wrapped in
altimate_change start — upstream_fix:markers — the repo convention for local deviations from upstream, so the bridge-merge process sees and carries them, and they can be retired if/when the fix lands upstream.Verification (E2E under Bun, full parse-mode matrix)
Drove each actual client file against a local server. 7 cases × v1/v2 × before/after:
json+ HTML body (JSON content-type)SyntaxError: JSON Parse error: Unrecognized token '<'(v2) /Failed to parse JSON(v1)Expected a JSON response but received application/json (HTTP 200). This is usually a proxy or gateway error page, not the API.json+ valid JSONjson+ empty body{}{}(unchanged)parseAs: blobBlobBlob(unchanged)parseAs: arrayBufferArrayBufferArrayBuffer(unchanged)parseAs: textparseAs: formData(real multipart)FormDatafield=valueFormDatafield=value (unchanged)The v2 "before" error is the exact string seen in telemetry (JavaScriptCore phrasing → confirms the crash runs in the Bun CLI, not the Node extension).
packages/sdk/jstypecheck (tsgo --noEmit) passes.Where it came from
Surfaced by the extension telemetry-triage bot as a recurring
ChatPanel:chat:sendMessageError(~11 machines / 7d).Post-review revision (2026-08-21)
The human review reshaped this PR; the description above predates it. Current state:
script/build.ts, not the gen file:clean: trueregeneratessrc/v2/genon every release build, so the guard is re-applied post-codegen (the SseFn-patch pattern), needle-matched against raw codegen output with a loud failure on template drift. The in-tree gen copy mirrors the post-build state. The earlier marker rationale doesn't apply to the gen trees (analyze.tsexcludes them from marker checks); v1's hunk survives becausesrc/genis a frozen snapshot, not because of markers.text/html(incl.; charset=utf-8) → normalized v2 interceptor. Correction to the original text: an absent content-type resolvesparseAstostream(notjson); stream/blob-resolved bodies remain out of scope for this PR and would need interceptor-level handling.cause; body stays out of the message.case "json"previously threwSyntaxErroron an empty body (the original matrix here was wrong); it now returns{}, aligned with v2, which also meansresponseValidatornow runs against{}for chunked-empty 200 responses where it was previously unreachable.build.tsrun confirms the patch applies to freshly generated output; drift canaries pin both gen files and the build-script needle; live-server tests (packages/opencode/test/sdk-json-guard.test.ts) drive both failure shapes end to end.🤖 Generated with Claude Code
https://claude.ai/code/session_01LKJeLDMhBaYu16LrjGCf25
Summary by CodeRabbit
Bug Fixes
Tests