Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/rivet-dev/sandbox-agent/ampgit clone --depth 1 https://github.com/rivet-dev/sandbox-agentWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.04088 |
| Opus 5 | $0.00000 | $0.02044 |
| Sonnet 5 | $0.00000 | $0.00818 |
| Haiku 4.5 | $0.00000 | $0.00409 |
Grade A, and why
amp scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
VERSION=$(curl -s https://storage.googleapis.com/amp-public-assets-prod-0/cli/cli-version.txt) How it starts
The opening of the file, as written. The whole thing — 450 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Amp Research
Research notes on Sourcegraph Amp's configuration, credential discovery, and runtime behavior.
Overview
- Provider: Anthropic (via Sourcegraph, proxied through ampcode.com)
- Execution Method: CLI subprocess (
ampcommand) - Session Persistence: Session ID (string)
- SDK:
@sourcegraph/amp-sdk(closed source) - Binary: Bun-bundled JS application (ELF wrapping Bun runtime + embedded JS)
- Binary Location:
/usr/local/bin/amp - Backend:
https://ampcode.com/(server-side proxy for all LLM requests)
CLI Usage
Interactive Mode
amp "your prompt here"
amp --model claude-sonnet-4 "your prompt"
Non-Interactive Mode
amp --print --output-format stream-json "your prompt"
amp --print --output-format stream-json --dangerously-skip-permissions "prompt"
amp --continue SESSION_ID "follow up"
Key CLI Flags
| Flag | Description |
|---|---|
--print |
Output mode (non-interactive) |
--output-format stream-json |
JSONL streaming output |
--dangerously-skip-permissions |
Skip permission prompts |
--continue SESSION_ID |
Resume existing session |
--model MODEL |
Specify model |
--toolbox TOOLBOX |
Toolbox configuration |
Credential Discovery
Priority Order
- Environment variable:
ANTHROPIC_API_KEY - Sourcegraph authentication
- Claude Code credentials (shared)
Config File Locations
| Path | Description |
|---|---|
~/.amp/config.json |
Primary config |
~/.claude/.credentials.json |
Shared with Claude Code |
Amp can use Claude Code's OAuth credentials as fallback.
Streaming Response Format
Amp outputs newline-delimited JSON events:
{"type": "system", "subtype": "init", "session_id": "...", "tools": [...]}
{"type": "assistant", "message": {...}, "session_id": "..."}
{"type": "user", "message": {...}, "session_id": "..."}
{"type": "result", "subtype": "success", "result": "...", "session_id": "..."}
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 450 lines · 0 tokens per session scan A 3fe874a73f1a
amp is an agent published in the GitHub repository rivet-dev/sandbox-agent (1,551 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 4,088 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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