Integrate the already-merged step-limit work from develop. Only conflict was
ai-chat.service.spec.ts: both sides appended a describe block and edited the
import line. Resolved as a union — keep compactToolOutput + the assistantParts/
serializeSteps/rowToUiMessage suites (this branch) AND the prepareAgentStep
suite (develop), importing all symbols from ai-chat.service.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds explicit isIpAllowed cases for the CGNAT, ULA (fd00::/8) and IPv4-mapped
IPv6 loopback (::ffff:127.0.0.1) sample addresses from the parallel
safety-coverage branch. The mapped-loopback case is genuinely new (the existing
table only covered the mapped *private* variant); CGNAT and ULA ranges were
already covered with other samples and are kept here as explicit regression
guards for these specific addresses.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Behaviour change (split out of the test commit per review, and now covered).
Both the stream onError log line and the error text streamed to the client were
formatted by separate inline blocks that only emitted "<status>: <message>".
Route both through the shared describeProviderError() so formatting stays in one
place.
BEHAVIOUR CHANGE: describeProviderError additionally appends a single-line,
300-char-truncated snippet of the provider responseBody/text. So the log line
AND the user-facing stream error now include that snippet (e.g. the HTML error
page from a misconfigured endpoint), which previously neither did. This is
intentional — it makes a misconfigured external endpoint diagnosable — and is
safe: the API key travels in the Authorization header and is never echoed in
the response body (see the util's docstring). A `fallback` param is added so
each call site keeps its own default ('AI stream error' for the stream).
Adds ai-error.util.spec.ts covering the formatter, including the appended /
truncated body snippet, so this behaviour is no longer untested.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Behaviour change (split out of the test commit per review).
In AI SDK v6 the useChat `onFinish` callback does NOT fire when the stream
errors. A brand-new chat whose very first turn fails would therefore never run
the post-turn path: the chat list was not invalidated and the client never
adopted the server-created chat id — so the failed chat only appeared in
history after a manual refresh (the server already creates the row and stores
the error message). Running the same `onTurnFinished()` handler on `onError`
makes the failed chat show up immediately. The error itself is still surfaced
to the user via the existing `error` state.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Unit tests for the safety-critical paths: crypto secret-box (round-trip,
tamper detection, wrong key), the SSRF guard (blocked ranges + DNS-rebinding),
the ai-chat tools service, the page-embedding repo, and the
assistant-parts/serialization helpers. Those server helpers (assistantParts,
rowToUiMessage, serializeSteps) are exported ONLY for the tests — no runtime
change.
Also: keyboard a11y on the chat history header and conversation rows
(role/tabIndex/Enter+Space), and DRY refactors that move shared logic into one
place (isToolPart -> tool-parts util; buildInitialValues in the MCP form).
The behaviour-changing edits that previously rode along in this commit are
split out into the following two commits, per review.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
