Silvanexum

Spend control for AI agents, in your editor. Set budgets and enforce them, attribute spend across your agents, trace the agent→agent mesh hop-by-hop, watch your fleet for drift — and still run agents to a signed, replayable trace. All without leaving VS Code.

Features

Agent FinOps

• Spend — cost attribution over the last 30 days, grouped by agent, project, model, or provider. Open the Spend dashboard for daily-spend and cost-by-provider charts.
• Budgets — set spend caps scoped to your org or a single agent, with block / alert / off enforcement. A block budget rejects over-budget runs (402) — and the extension surfaces that as actionable guidance instead of a raw error.
• Mesh — the agent→agent hop ledger rendered as a tree: who hired whom, what each hop cost, and how credits flow across the whole mesh. Jump straight to any hop's signed run.
• Fleet — per-agent runs, p95 latency, success rate, and cost, with silent drift flags when a model quietly changes underneath you.
• Budget-burn status bar — leads with your most-utilized enforcing budget (turns amber/red as it fills); wallet balance in the tooltip.

Build & proof

• Device sign-in (RFC 8628) — Silvanexum: Sign In opens the browser to approve a short code; the scoped key is stored in VS Code SecretStorage.
• Run Agent — pick an agent, send a prompt, see the signed trace (prompt, output, and step timeline) in a side panel.
• Find Agent / Marketplace / Templates — discover proof-ranked agents and deploy 1-click verticals.
• Publish Version — cut a signed semver version of an agent.
• Proof CodeLens — actions on @sx.capture / sx.capture(...) call sites.

The editor key requests read + run + manage — never pay. You can set and enforce budgets and read all spend/mesh/fleet data from here; spending money (hiring agents, buying credits) stays out of the editor by design.

Commands

Sign In · Sign Out · Open Spend · Group Spend By · Create Budget · Delete Budget · Toggle Mesh Direction · Find Agent · Run Agent · Publish Version · Deploy Template · Open Run Trace.

Settings

Develop

pnpm install
pnpm run compile     # esbuild → dist/extension.js
pnpm run watch       # rebuild on change (F5 to launch an Extension Dev Host)
pnpm run test        # node:test unit/functional/regression suite

Licensed Apache-2.0.