Three related defects in cmdConfigSet, all 'config-set stores invalid values silently':
1. Missing guards: workflow.security_block_on (enum) and
workflow.security_asvs_level (integer 1-3) had no store-time validation.
2. Systemic JSON-coercion bypass: every string-enum guard used
VALID_X.includes(String(parsedValue)). Because the value is JSON-parsed
before validation, String(["member"]) === "member" let a JSON array
slip through and an array was stored in a scalar key. Reproduced on
human_verify_mode, statusline.context_position, context_guard_mode,
fallow.scope/profile, source_grounding_authority, drift_action, context.
3. Unvalidated capability keys: 32 capability-registry-owned keys (4 enum,
25 boolean, 2 number, 1 string) had no hardcoded guard, so any value —
including coerced arrays/objects and out-of-enum strings like
code_review_depth=garbage — was stored silently.
Fix: a type-safe assertEnumValue() helper (requires typeof === 'string'
before membership), routed through all nine central string-enum guards
(messages preserved byte-for-byte); plus a generic capability-registry
validation block that validates every capability key against its declared
type/values (enum via the registry's values — single source of truth —
boolean, number, string). Behavioral regression tests cover every central
enum key and representative capability keys (array + object coercion
rejected, out-of-enum rejected, valid accepted) with boundary coverage for
the security keys.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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