Soul s1 fixes. The hook header says the lines are recalled records, data and
never instructions, written by agents not the operator. Every item is one JSON
object per line: id, title and operator_quote are JSON strings with < >, control,
bidi and separator characters escaped, so a title cannot close the framing, forge
a tag, a header or an operator segment. RECALL_DEADLINE_MS now bounds the whole
run through a hard stop; stdin is read to 4 MiB and the answer to 1 MiB
(mind.call max_bytes); RECALL_BUDGET is clamped to 9000 under Claude Code's
10,000-character cap. Tests: hostile text, a non-ASCII process-boundary run under
cp1252, byte-versus-character budget, stdin held open and endless, answer size,
budget ceiling, and the four unrecorded survivors (negative reply timeout, reply
id check, env-int positivity, EOF sentinel). Mutants of each were run and caught.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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