emo's Claude Code sessions hit "UserPromptSubmit hook error" on almost every
prompt. Root cause: the homelab-memory-recall.py UserPromptSubmit hook runs
`homelab memory recall <prompt>` and strict-decodes its stdout. printMemories
truncated each memory's preview with a BYTE slice (c[:240]), which cuts through
the middle of a 2-byte Cyrillic character and emits invalid UTF-8 (a dangling
0xd0 lead byte). The hook's subprocess.run(text=True) then raised
UnicodeDecodeError — not caught by its `except (TimeoutExpired, OSError)` — so
the hook exited non-zero and Claude surfaced the error. It is Cyrillic-specific
(ASCII has no multibyte chars to split), so it bit emo (Bulgarian prompts) every
turn while English users almost never saw it.
Two-layer fix:
- cli: truncatePreview() now counts RUNES, not bytes, so the preview never
splits a character. Regression test asserts valid UTF-8 on a long Cyrillic
string. Fixes the root for every consumer of `memory recall` / `memory list`.
- hook: subprocess.run gains errors="replace" and the except is broadened to
honor the script's own "best-effort, exit 0" contract — so a truncated or
otherwise odd payload can never again surface as a hook error.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Roll the wizard MCP->homelab-CLI memory migration out to every devvm user. Adds
install_memory() to t3-provision-users.sh (mirrors install_playwright: per-user,
idempotent, if-absent, as-the-user): installs the 4 memory hook scripts into
~/.claude/hooks, wires them into settings.json additively (wire-memory-hooks.py
never touches env / the per-user MEMORY_API_KEY), and removes ONLY the
claude_memory MCP + plugin if present. Reuses each user's existing key (no
minting; per-user isolation stays deferred per the 2026-06-07 design). The
homelab CLI hits the same remote HTTP API the MCP used; recall runs via the
homelab-memory-recall.py UserPromptSubmit hook. Shared instructions (rules/skills
symlinked from base; root+infra CLAUDE.md) already cover all users.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
