cost-projection
Forward-looking spend extrapolation. Computes a USD-per-day rate from the recent measurement window, projects to 7d/30d/90d/365d horizons, and surfaces "days until budget exhausted" when a budget is configured. Predictive counterpart to `cost-budget-check` (reactive).
Profile →npx skills add ruvnet/ruflo --skill cost-projection --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
Forward-looking cost projection that pairs with `cost-budget-check`: - **`cost-budget-check`** answers "have we crossed the line?" — reactive - **`cost-projection`** answers "when will we cross the line?" — predictive ## Algorithm 1. Read all `session-*` records from the `cost-tracking` namespace (same source `cost-budget-check` uses). 2. Filter to a measurement window (default last 7 days on `capturedAt`/`startedAt`). 3. Compute the per-day burn rate: `windowSpend / windowDays`. 4. Linear-extrapolate to each requested horizon (default 7d/30d/90d/365d). 5. If a budget is configured (`budget-config` key set by `cost-budget set`): - Compute "days until 75% / 90% / 100% consumed" at the current rate. - Surface as a separate table block with `ALREADY REACHED` markers for thresholds already exceeded. ## Flags --window <duration> Measurement window. `Nh|Nd|Nw|Nm`. Default `7d`. --horizons <csv> Projection horizons. Default `7d,30d,90d,365d`. --format table|json Default `table` (markdown). Env: `PROJECTION_NAMESPACE` override (default `cost-tracking`), `PROJECTION_QUIET=1` (alias for `--format json`). ## Smoke transcript (3 sessions × $1 over 7d, $20 budget) ``` | Sessions in window | 3 |
- Algorithm
- Flags
- Smoke transcript (3 sessions × $1 over 7d, $20 budget)
- When to use
- Stationarity assumption
What does the cost-projection skill do?
Forward-looking spend extrapolation. Computes a USD-per-day rate from the recent measurement window, projects to 7d/30d/90d/365d horizons, and surfaces "days until budget exhausted" when a budget is configured. Predictive counterpart to `cost-budget-check` (reactive).
How do I install it?
Run `npx skills add ruvnet/ruflo --skill cost-projection --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From ruvnet/ruflo, a repository with 67,015 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.