Proxy writes and session-log sync wrote to proxy_request_logs with
mismatched request_ids: only Claude on a native Anthropic backend used the
shared `session:{message_id}` key. Codex/Gemini and Claude-through-OpenAI
providers always produced distinct ids, so primary-key dedup never fired
and every real request was recorded twice.
Adds a 7-dim fingerprint dedup (app_type, 4 token counts, 2xx status,
model with case-insensitive match, ±10min window) wired into three layers:
- Write path: should_skip_session_insert() blocks duplicate session rows
before INSERT, unifying the previously-divergent Claude/Codex/Gemini
paths through a single DedupKey-based helper.
- Read path: effective_usage_log_filter() excludes already-covered session
rows from every aggregation query.
- Rollup path: same filter applied so usage_daily_rollups never absorbs
duplicates.
Also adds a covering index (idx_request_logs_dedup_lookup) so the EXISTS
subquery stays index-only, and a transform.rs regression test that pins
openai_to_anthropic id preservation - the missing piece that lets
Claude+OpenAI-compatible providers reuse the session: id scheme.
Extract message_id from Claude API responses (msg_xxx) and use it to
generate a shared request_id format (session:{msg_xxx}) between the
proxy logger and session log sync. When session sync encounters the
same request_id via INSERT OR IGNORE, it skips the duplicate.
- Add message_id field to TokenUsage, extracted from Claude responses
- Add TokenUsage::dedup_request_id() to generate shared request IDs
- Define SESSION_REQUEST_ID_PREFIX constant to eliminate magic strings
- Change proxy logger to INSERT OR REPLACE for richer-data-wins semantics
- Use UPSERT with WHERE guard instead of INSERT OR IGNORE, so updated
token values on existing messages are properly synced without
unnecessary rewrites of unchanged rows
- Include cached tokens in the skip-zero filter to stop silently
discarding pure cache-hit records
- Restrict file collection to session-*.json to match documented scope
and prevent ingesting non-session JSON files
Parse ~/.gemini/tmp/*/chats/session-*.json for precise per-message
token data (input/output/cached/thoughts). Integrates with existing
background sync and manual sync button alongside Claude and Codex.
Jason