PR #1854 added a math stash to _renderUserFencedBlocks so backslash LaTeX
delimiters (\[..\], \(..\)) survive esc() and reach the KaTeX renderer in
user bubbles. The stash ran BEFORE the existing code-fence stash, so a
user-typed code block containing LaTeX-like syntax was extracted as
KaTeX and rendered as math inside <pre><code>:
```
\[ a + b \] is wrong
```
→ <pre><code><div class="katex-block"> a + b </div> is wrong</code></pre>
renderMd() (assistant path) handles this correctly by running fence_stash
before math_stash. The user-bubble path got the order inverted. Fix:
stash code fences first, then run the math regexes on the
outside-of-fence text only. Both top-level math and code-fenced literals
now render correctly:
- "math: \[ x + y \]" → KaTeX block
- "```\n\[ a + b \]\n```" → literal <pre><code>\[ a + b \]</code></pre>
Adds two regression tests:
- test_user_code_block_with_latex_syntax_renders_as_literal_code
(fails pre-fix, asserts no KaTeX wrappers inside <pre><code>)
- test_user_bubble_top_level_latex_still_renders_after_fence_reorder
(sibling guard against over-correcting and disabling math entirely)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Batch release v0.50.231 — 3 fixes.
## PRs included
| PR | Author | Fix |
|---|---|---|
| #1186 | @nesquena (Claude Code) | macOS `/etc` symlink bypass in workspace blocked-roots |
| #1187 | @nesquena-hermes | Workspace panel stuck closed after empty-session reload |
| #1190 | @bergeouss | Fenced code content leaking into markdown passes (#1154) |
All three PRs were independently reviewed and approved by @nesquena.
## Test results
**2729 passed, 2 skipped** (2 macOS-only tests correctly skipped on Linux). Browser QA: **21/21**.
## Key fix notes
**#1186:** `_workspace_blocked_roots()` now returns both literal and `Path.resolve()` forms of each blocked root. macOS symlinks (`/etc → /private/etc`) previously let a resolved candidate slip past the literal check. New `_is_blocked_system_path()` helper with `/var/folders` and `/var/tmp` carve-outs for pytest temp dirs.
**#1187:** Regression from #1182 — `syncWorkspacePanelState()` force-closed on any no-session state. Now only closes in `'preview'` mode. Both boot paths restore localStorage panel pref before sync.
**#1190:** Fenced code blocks are now stashed as `\x00P<n>\x00` tokens through ALL markdown passes (list/heading/table regexes), restored at the very end. Previously, diff hunks and markdown headings inside code blocks triggered those regexes, injecting `<ul>/<li>/<h>` tags that broke `</pre>` closure.
* feat: KaTeX math rendering for $..$ and $$..$$ in chat and previews (fixes#347)
- Stash math delimiters before markdown pipeline, restore as .katex-block/.katex-inline elements
- KaTeX JS lazy-loaded from CDN on first math block (mirrors mermaid pattern)
- KaTeX CSS loaded eagerly in <head> to prevent layout shift
- SRI hashes on both CDN tags
- throwOnError:false — bad LaTeX degrades to code span
- Supports $$, $, \\(...\\), \\[...\\] delimiters
- 18 new tests, 831/831 passing
* fix: remove invalid \' escape sequences in math stash lines
Lines 311, 314, 316, 317 had \' (backslash-quote) instead of plain '
in the arrow function bodies. This is a JS syntax error — node --check
fails with 'Invalid or unexpected token'. Likely caused by a
serialization artifact during code generation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: swap stash order (fence before math) to protect code spans; add renderKatexBlocks to workspace preview
- static/ui.js: fence_stash now runs BEFORE math_stash so dollar signs
inside backtick code spans are not extracted as math. Previously
`$x$` would render as KaTeX inside a <code> tag instead of
showing the literal string $x$.
- static/workspace.js: add requestAnimationFrame(renderKatexBlocks)
after markdown preview renders so math works in workspace file
previews, not only in chat messages.
* feat: KaTeX math rendering + stash order fix + workspace wiring (#352)
- tests/test_issue347.py: 11 new tests (29 total) covering fence-before-math
ordering, workspace.js renderKatexBlocks call, stash token distinctness,
false-positive prevention, safe-tags boundary check
- CHANGELOG.md: v0.50.15 entry; 870 tests total (up from 841)
* fix: use literal null byte (\x00M) in math stash token — matches restore regex
The original PR's second commit (fix: remove invalid \' escapes) accidentally
doubled the backslash in the math stash tokens: '\\x00M' is a 5-char string
(backslash + x + 0 + 0 + M) but the restore regex /\x00M/ expects a null byte.
Result: $...$ in messages produced visible \x00M0\x00 tokens instead of
KaTeX spans.
Changed all 4 math stash return statements to use '\x00M' (single backslash =
null byte, same convention as fence_stash's '\x00F').
Also updates test_stash_tokens_distinct to check for the correct pattern.
* fix: add null-byte token test; update CHANGELOG to v0.50.15 with fixes
- tests/test_issue347.py: add test_math_stash_token_uses_single_backslash_null_byte
to catch the \\x00M double-backslash regression; 30 tests total (up from 29)
- CHANGELOG.md: v0.50.15 entry documents all fixes including the token bug
and workspace preview wiring; 871 tests total
---------
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Nathan Esquenazi