ccusage ccusage Agent Sources
Every agent is an adapter crate in rust/adapters/<agent> that turns one
source's raw logs into the shared report shapes. ccusage <report> aggregates
all of them; ccusage <agent> <report> scopes to one.
Which reports an agent accepts is not uniform, and it is encoded twice:
STANDARD_AGENT_REPORTS / OPENCODE_AGENT_REPORTS in
rust/crates/ccusage-cli/src/types.rs drive parsing, while
agent_report_supported in rust/crates/ccusage-cli-parser/src/parser.rs
decides what is accepted per agent name. Changing an agent's report set means
updating both. Keep command names and flag semantics aligned across agents
unless the source data forces the difference, and say so in a comment when it
does.
Cost handling is shared, not per-agent: auto, calculate, and display
differ only in how a record's precomputed costUSD competes with token-derived
cost, decided in rust/crates/ccusage-core/src/cost.rs. Pricing comes from
LiteLLM with an embedded snapshot behind --offline (pricing.rs, and the
rust skill for how both snapshots are built into the binary).
Before Changing A Source
Read that agent's own docs first — they carry the paths, record shapes, token mapping, model fallbacks, and cost quirks that are not shared:
rust/adapters/<agent>/README.md- what the crate owns and where its data lives.rust/adapters/<agent>/src/README.md- record shapes and token/cost rules, present for the sources that need them.
Architecture and the shared-vs-source boundary live in
rust/adapters/README.md; the per-change workflow in rust/adapters/AGENTS.md.