ccusage-adapter-copilot

The GitHub Copilot CLI adapter: it turns Copilot session-state and OpenTelemetry JSONL files into the usage entries the reports render.

Owns

• loader.rs — reading the source, dedupe, and date filtering.
• parser.rs — raw record parsing, token mapping, and model naming.
• paths.rs — environment variables, default directories, and file discovery.
• report.rs — the JSON and table shapes where they differ from the shared ones.

Anything that is not specific to this source belongs in ccusage-core or ccusage-adapter-common instead.

Data source

• ${COPILOT_HOME:-~/.copilot}/session-state/*/events.jsonl
• ${COPILOT_HOME:-~/.copilot}/otel/**/*.jsonl
• COPILOT_HOME (single relocated Copilot data root)
• COPILOT_OTEL_FILE_EXPORTER_PATH (one explicit JSONL file)

Session-state shutdown records are cumulative per canonical (session, model) pair, so only the latest shutdown is retained. They are preferred for a matching pair when both sources contain it. Matching OpenTelemetry rows are suppressed only when their timestamps are at or before the latest canonical shutdown timestamp for that pair; rows emitted after that timestamp by a resumed session are retained. Other OpenTelemetry records remain available. Session-state inputTokens includes cache reads and writes, so the adapter reports the uncached remainder as input and keeps the cache buckets separate. Session-state reasoning tokens are already included in output tokens; OpenTelemetry reasoning is included when total usage metadata shows it is separate. Internal model suffixes such as -1m and -1m-internal are removed before pricing and source deduplication.

Reads plain files through ccusage-adapter-common, which handles walking, size-balanced chunking, and ordered parallel reads.

Public surface

• loader::load_entries
• report::report_from_rows
• report::summarize_entries
• run

Depends on

• ccusage-adapter-common
• ccusage-core
• jiff
• serde
• serde_json

Build layer

Built in the adapters Crane artifact layer; the layer compiles all adapters in one Cargo invocation, so they build concurrently.