Review fixes. Two of these are defects in the previous commit.
1. The fetch deadline only covered time-to-headers. `await fetch()` settles on
response headers, so clearing the abort timer in a finally around it left the
body — the multi-megabyte `?full=1` capture the deadline exists for —
completely unbounded; it only ever bounded a server that accepts a connection
and never replies. Measured against a server that sends headers immediately
and stalls the body 4s under a 1s deadline: fetch resolved at 30ms, timer
cleared there, body completed at 4026ms unaborted. Now the body is read
inside `_fetchTerminalCapture`, which returns {json, headers, headersAt} —
headers because two callers read server-timing, headersAt because those same
callers measure header-vs-body time and can no longer observe that moment.
`_terminalCaptureInflight` is scoped the same way, so a body still streaming
counts toward a capture starting beside it. Same test now aborts at 1005ms.
2. The precache could never be hit, and the previous commit made that expensive
rather than free. `renderIndexHtml` runs `cacheBustAssets`, which appends
`?v=<mtime>` to every same-origin .js/.css reference INCLUDING content-hashed
names — confirmed against a running instance:
`vendor/xterm-zerolag-input.6fee72f2.js?v=1789402869101`. `caches.match` is
query-sensitive, so entries keyed on the bare hashed path were unreachable;
deriving the list from the manifest turned cheap 404s into ~1.3MB downloaded
at every install that nothing could read back, once per deploy now that
CACHE_NAME rotates. The fallback match takes `{ ignoreSearch: true }`, which
also lets runtime-cached entries survive an mtime change.
3. `_wsOutputGapSession` was only cleared in ws.onopen, so paths that already
repaint the buffer left it set and the socket replayed everything a second
time. `selectSession` loads the buffer and only THEN calls `_connectWs`, so
neither the _isLoadingBuffer nor the _terminalRefreshOwner guard applied.
`_markTerminalBufferReconciled()` is now called from _onSessionNeedsRefresh's
finally, from selectSession after its load, and from _cleanupSessionData.
The scope claim was also wrong and is corrected in the comment: when the
network drops, SSE drops with it and handleInit's keepTerminal branch already
reconciles. The genuinely uncovered case is the WS dying while SSE stays up,
where _onSSETerminal discards SSE terminal frames until _wsReady flips in
onclose — up to the ping+pong window of output nothing writes.
4. CLAUDE.md said "all of them measured rather than reasoned", which the PR's
own "not verified" section contradicted. Split explicitly: the replay race is
measured, the watchdog mechanism is verified against xterm 6.0.0 under jsdom
(field path resolves, a forced stale handle makes refreshRows a no-op, the
kick schedules a fresh frame), and the iOS rAF-discard premise is reasoned
and still wants a device. Adds the two missing entries — the WebSocket
reconcile and the sw.js/build.mjs "keep these in sync or the build throws"
contract.
Also: test/xterm-private-api.test.ts pins the RESOLVED lockfile version instead
of the declared `^6.0.0` range, which was the wrong assertion in both directions
— a real upgrade to 6.4.0 can rename a private field while resolving inside the
range, and an innocuous range edit failed while changing nothing installed. And
test/sw-precache-manifest.test.ts now parses HASHABLE out of scripts/build.mjs
rather than hand-copying it, which was the same drift this PR exists to fix; the
parse is guarded against silently matching nothing.
The deadline fix has a behavioural test against a real socket plus a source
guard asserting `await res.json()` precedes the finally — verified to fail when
the helper is reverted to the old shape, so it is not vacuous.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
