api_v3.py carried three inline nested copies of find_secret_fields/
separate_secrets (main-config save, plugin-config save, plugin-config
reset). They drifted from each other (one lacked isinstance guards) and
none supported the canonical module's array-item secrets
(accounts[].token). All three endpoints now import from
src/web_interface/secret_helpers.
Adopting the canonical behavior makes array-item secrets reachable, and
their parallel-placeholder shape ([{'token': ...}, {}] alongside the
regular list) was not survivable by ConfigManager's round-trip:
_strip_secrets_recursive dropped the whole key (losing the regular
fields from config.json) and _deep_merge replaced the regular list
wholesale on load. Both are now array-aware:
- strip removes the secret fields from each item and ALWAYS keeps the
list so indices survive for merge-on-load; whole-key secrets (scalar
lists, shape mismatches) still drop the key entirely — never leak.
- merge folds each secrets item into the config item at the same index,
skipping {} placeholders. The regular list's length is authoritative
in both directions: a user deleting an array item never has it
resurrected from a stale secrets entry (extras warn and are ignored).
api_v3's own deep_merge intentionally still replaces lists wholesale —
form posts carry complete arrays and index-merging would resurrect
deleted items; a comment now documents that.
Tests: the parity guard flips from 'exactly 3 inline copies' to 'zero,
and the canonical import must exist'; TestArraySecretStripAndMerge
covers the new strip/merge semantics incl. length-mismatch contracts;
new test_api_v3_secret_roundtrip.py drives all three endpoints through
a Flask client with a REAL ConfigManager+SchemaManager over tmp_path,
proving secrets land in config_secrets.json, config.json stays clean,
and a fresh load merges them back into the right array items.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NohXi78cwsAKtN1sCfxjUh
