Metrics previously only declared a data type (String/Number/...), so
rate() could be applied to a point-in-time gauge reading and sum()/avg()
could be applied directly to a cumulative counter reading with no guard
against either. Adds a MetricSemantics enum (Gauge, default; Counter)
threaded through DeclareMetricRequest, the engine's MetricDeclaration
data value, profile persistence, the API/MCP declaration routes, and the
Metrics panel's declaration form, then uses it in evaluate_promql to
reject rate() on a declared gauge and bare sum()/avg() on a declared
counter (suggesting rate() first). The guard only applies to metrics
with a captured value_param — bare occurrence-count metrics are always
safe under both operations, so existing dashboards are unaffected.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TeyhRfMYjMditek6geDRoQ
Formats the whole backend to rustfmt defaults and fixes all 23
outstanding clippy warnings (collapsible ifs, clone-to-slice-ref,
type-complexity, single-arm match, unnecessary is_none check), then
wires cargo fmt --check and -D warnings into make lint so both stay
enforced going forward.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TeyhRfMYjMditek6geDRoQ
- src/api/: HTTP router + DTOs + the MCP server (the HTTP/MCP-facing
surface): mod.rs (formerly api.rs), dto.rs, mcp_server.rs.
- src/cli/: argument parsing and process entry (formerly inline in
main.rs) plus session registry: mod.rs, sessions.rs. main.rs is now
a thin entry point that just declares modules and calls cli::run().
- src/engine/: the actor + everything it depends on to parse/index/
query log lines: mod.rs (formerly engine.rs), alerts.rs, promql.rs,
rate.rs, ingest.rs, logfmt.rs, filter_parser.rs/.pest,
filter_datetime.rs, index_key.rs, data_value.rs, metric_primitive.rs,
timestamp.rs.
- src/config/: persisted configuration: mod.rs (formerly settings.rs),
profile.rs.
- src/consts.rs stays at the crate root, used from every module above.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A1ZJ3SrayzLzVndhVq9BmS
