Counters (always on when admin is enabled):
- last seen per user and group, written asynchronously after
admission, throttled to one write per scope per minute per replica
- hourly provider and model attempts, failures and timeouts
- failovers per provider, rejections per hour, and unpriced (402)
refusals
- cache hits, misses and cost saved
- request counts per target and caller
Opt-in counters under admin.stats (both default off):
- userModel: usage per user and model
- latency: latency histograms per provider and model
All counters ride the existing Redis batches. A test measures three
round trips per request with defaults and with every statistic on. A
cache hit takes two. A model request is no longer counted for failed
failover candidates.
New admin endpoints:
- usage/series and usage/totals
- performance, with percentiles from the histograms
- catalog, with the price billing actually uses and its source
- consumers, with key source, grants and model access
- config, with secrets redacted
The overview gains features and a pricing summary. Usage gains
lastSeen. usage/models gains offset and more detail fields. Reads are
chunked at 1600 keys per round trip and capped at 64000 keys per
request.
Claude-Session: https://claude.ai/code/session_01V5jYJNxpDFdJkyyExpADrv
Billing:
- Passthrough SSE streams now bill the usage the upstream reports.
The gateway falls back to a request-size estimate only on a 2xx
stream or a truncated JSON body.
- A unified stream that fails after it starts is estimated, not
billed at zero.
- Billing uses the built-in LiteLLM price table and honours
modelMeta free: true.
- Pricing entries are validated. Cost arithmetic rounds the total and
saturates on overflow.
- Gemini thinking tokens count as completion tokens.
Limits and storage:
- A rejected request rolls back its counts on the other scopes, so one
user cannot lock out a group.
- Redis EXPIRE replies are checked. Keys recreated without a TTL are
repaired at once.
- A mutating pipeline is not retried after reply bytes arrive.
- History, model totals and target usage report a store outage.
Routing and translation:
- Discovered ids with a provider-like prefix are listed only in
owner/id form, so listing and routing agree.
- Anthropic and Gemini discovery follows pagination.
- The developer role maps to system.
- stream_options.include_usage is honoured on translated streams.
- tool_choice none keeps tools when history holds tool blocks.
- refusal maps to content_filter. Data URI parameters are stripped.
Streaming, retry and failover:
- SSE accepts CR, LF and CRLF line ends. This closes a CR injection
path.
- Retry-After is never jittered. A cancelled wait returns the
context error.
- The watchdog timer stops at end of body.
- Oversized bodies return 413.
- A failed stream ends with an error event.
- Failover restores pre-existing headers. Client cancels do not count
as provider successes.
Also: "admin" is a reserved provider name. metrics.path must start
with "/". Pricing warnings go to the right gateway instance. The admin
targets view sends access as null or [] so the two states differ.
Upstream organisation headers are stripped. The users-file reload
error is logged once per error. Dead code is removed, and test-only
helpers move to test files.
Claude-Session: https://claude.ai/code/session_01V5jYJNxpDFdJkyyExpADrv
lukaszraczylo