fix(user-testing): stop branding the tester shell as Claude while it loads - #4061
fix(user-testing): stop branding the tester shell as Claude while it loads#4061olartgabo wants to merge 3 commits into
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Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. WalkthroughThe change replaces hardcoded Claude fallback identifiers with Merge Risk: ⚪ Minimal · up to The change keeps unresolved scenario screens neutral, prevents stale-session branding, and preserves an accessible loading name; no actionable merge-blocking risk remains after normal checks and review. Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
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Inline comments:
In `@mcpjam-inspector/client/src/components/hosted/ScenarioChatPage.tsx`:
- Around line 944-948: Ensure ScenarioChatPage uses the session matching the
current pathToken before selecting host style or rendering host logo/label;
otherwise use DEFAULT_HOST_STYLE.id and neutral branding while redemption is
pending. Apply this guard at
mcpjam-inspector/client/src/components/hosted/ScenarioChatPage.tsx lines 944-948
and 1152-1171. Update
mcpjam-inspector/client/src/components/hosted/__tests__/ScenarioChatPage.test.tsx
lines 288-309 to seed an older session during redemption and assert neutral
branding.
Apply the same fix in
`@mcpjam-inspector/client/src/components/hosted/__tests__/ScenarioChatPage.test.tsx`
around lines 288 - 309: Covers the required persisted-session regression case
and resolved-session behavior.
In `@mcpjam-inspector/client/src/components/hosts/HostCanvas.tsx`:
- Line 50: Add component coverage for HostCanvas’s hostStyle resolution: verify
omitted and null data.hostStyle values render using DEFAULT_HOST_STYLE, while
retaining a test for a valid host style; also cover an empty value if the input
type permits it.
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mcpjam-inspector/client/src/components/hosted/ScenarioChatPage.tsxmcpjam-inspector/client/src/components/hosted/__tests__/ScenarioChatPage.test.tsxmcpjam-inspector/client/src/components/hosts/HostCanvas.tsxmcpjam-inspector/client/src/lib/client-styles/registry.ts
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…loads A tester opening a shared scenario link saw the Claude mark and the word "Claude" in the header for the whole load, whatever host the scenario actually emulated. ChatboxChatPage seeded `hostStyle` with the literal "claude" while `session` was null, and the header renders outside the loading branch, so the wrong vendor stayed on screen until the redeem landed. `DEFAULT_HOST_STYLE` (MCPJam) exists so unresolved surfaces do not impersonate a vendor; the page now uses it, and the header holds a placeholder until the redeem names the host rather than painting one brand and swapping to another. Same literal fixed in the host builder canvas, where a node with no host style also rendered Claude's logo.
…redemption The DEFAULT_HOST_STYLE fallback only covered `session === null`. `session` is seeded from sessionStorage, which outlives the page, so a tester who opens a second scenario link redeems B while still holding A's session: the shell wore A's host brand for the whole redemption. That is the impersonation the fallback exists to prevent, sourced from the last visit instead of a hardcoded seed. Derive branding from the session only when its own `shareToken` matches the token in the address bar. Both values are trimmed at their source (`scenario-session.ts:470`), so the comparison is sound. With no token in the path — the post-redeem strip removed it — the stored session is this link's and keeps full branding. Covered by "does not wear the previous scenario's brand while a new link redeems", which fails on the unguarded derivation with `[data-host-style="claude"]` present during redemption. Also adds the missing HostCanvas coverage for hostStyle resolution: an omitted or empty `data.hostStyle` renders DEFAULT_HOST_STYLE, a valid one renders its own logo. `hostStyle` is `HostStyleId | undefined` and non-nullable upstream, so an explicit `null` case is unreachable and is not asserted.
… redeems The placeholder that replaced the seeded Claude mark is decorative (`aria-hidden`), so the header carried no heading at all for the whole redemption: a screen reader had nothing naming the shell until the redeem landed, where before it at least had a (wrong) vendor name. Add an `sr-only` h1 alongside the skeleton. "Loading scenario" names the surface without naming a vendor, which is the point of the placeholder.
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2 participants
A tester opening a shared scenario link saw the Claude mark and the word
"Claude" in the header for the whole load, whatever host the scenario actually
emulated. The team hit this on an org-invited scenario that wasn't a Claude host
at all.
ScenarioChatPageseededhostStylewith the literal"claude"whilesessionwas null, and the header renders outside the loading branch — so thewrong vendor stayed on screen until the redeem landed.
DEFAULT_HOST_STYLE(MCPJam) exists precisely so unresolved surfaces don'timpersonate a vendor;
registry.tssays so in a comment. The page now uses it.The header holds a placeholder until the redeem names the host, rather than
painting one brand and swapping to another once it resolves — that swap reads as
a glitch.
A stored session is no proof of the host either:
sessionStorageoutlives thepage, so a tester opening a second link redeems scenario B while still holding
scenario A's session, and the shell wore A's brand for the whole redemption.
Branding is now derived from the session only when its own
shareTokenis thetoken in the address bar.
The placeholder is decorative (
aria-hidden), which left the header with noheading at all during redemption — a screen reader had nothing naming the shell,
where before it at least had a wrong vendor name. An
sr-onlyh1("Loadingscenario") sits alongside the skeleton: it names the surface without naming a
vendor.
The same literal is fixed in the host builder canvas, where a node with no host
style also rendered Claude's logo, and a stale comment on
getHostStyleOrDefaultthat still claimed a Claude fallback is corrected.Testing
ScenarioChatPage.test.tsx: a case that holds the redeem open and asserts thebootstrapping frame carries no Claude asset, no Claude label, and a
"Loading scenario" heading; a second case seeds a previous scenario's session
and asserts the new link's redemption doesn't wear its brand.
HostCanvas.test.tsx: omitted, empty, and explicitdata.hostStyle. The typeis
HostStyleId | undefined, so the??covers the missing case and an emptystring falls back through the registry lookup rather than the
??.ScenarioChatPage.test.tsx40/40 andHostCanvas.test.tsx3/3.mainbefore verifying.npm run typecheckandnpm run typecheck:client -w @mcpjam/inspector(with the tier-B import guard)both exit 0.
local-environment failures on Windows — symlink
EPERM, 30s timeouts onsubprocess- and DNS-bound tests, and one file that passes on its own — and
none are in this diff's import graph.
test:ci:reststops on the@mcpjam/design-systemtokens-parity check, which compares an LF fileagainst a CRLF one;
docs:check-tokensfails the same way. Both are CRLFartifacts of a local checkout, and
test.ymlis green on themaincommitthis branch is rebased onto.
The
?? "claude"defaults inChatHistoryRail/ChatHistoryRoware left aloneon purpose: they feed
getChatboxHostFamily, and MCPJam's own family is"claude", so changing them would be churn with no visual effect.Summary by cubic
Stop branding the tester header as Claude while a shared scenario link redeems or when a stale session is present. Previously the header showed Claude or the last scenario’s brand; now it uses MCPJam’s
DEFAULT_HOST_STYLEand a neutral placeholder until the host resolves, with an sr-only heading for accessibility.session.shareTokenmatches the link token; otherwise fall back toDEFAULT_HOST_STYLE.id, render a placeholder, and keepchatUiOverridenull until resolved.data.hostStyletoDEFAULT_HOST_STYLE.id; add tests for omitted/empty/explicit styles; updategetHostStyleOrDefaultcomment to referenceDEFAULT_HOST_STYLE.ChatHistoryRail/ChatHistoryRow?? "claude"defaults unchanged; MCPJam’s host family is"claude".Written for commit 0007e44. Summary will update on new commits.