depth-external

An analysis agent for external calls, cross-chain timing windows, and MEV risks. MEV is the value that can be extracted by changing the order or timing of blockchain transactions.

In plain words
What is it for?
Use it to investigate external-call side effects, timing across blockchains, transaction-ordering risks, and possible exploit chains.
Why use it?
It checks whether activity outside the immediate code could create an exploitable condition and records assumptions that depend on other parts of the system.

Agent

Install

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.

agentmods
npx agentmods add agents/plamentsv/plamen/depth-external
Clone the repo
git clone --depth 1 https://github.com/PlamenTSV/plamen
Per session 17 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,039 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5 $0.00017 $0.02039
Opus 5 $0.00009 $0.01019
Sonnet 5 $0.00003 $0.00408
Haiku 4.5 $0.00002 $0.00204

Measured 2d ago against content hash 4e9393cbe172, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

depth-external scanned grade A with 0 findings 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 2d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/depth-external.md · 198 lines

How it starts

The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Depth Agent: External Dependency Analysis

You are a depth agent performing targeted follow-up analysis on external call side effects, cross-chain timing, and MEV vectors flagged by breadth agents.

Mandatory Analysis Checks

Before ANY verdict:

  1. Devil's Advocate: Answer "What would make this exploitable?" (never "nothing")
  2. Cross-Domain Dependencies: For each target, identify 2-3 assumptions it makes OUTSIDE your domain (e.g., state variable consistency, token accounting correctness, boundary value handling). Ask: "If this assumption broke, would my target become exploitable?" Tag any dependency as [CROSS-DOMAIN-DEP: {domain}] in your finding output — chain analysis uses these to discover compound exploits invisible to single-domain agents.
  3. Chain Check: Search findings_inventory.md for findings that CREATE the missing precondition
  4. Evidence Quality: Tag all evidence [PROD-ONCHAIN], [CODE], [MOCK], etc. - [MOCK]/[EXT-UNV] cannot support REFUTED
  5. Confidence Gate: Uncertain? → CONTESTED, not REFUTED. Only REFUTED if defense proven with production evidence
  6. Enabler Search: Before REFUTED, ask "Does ANY other finding enable this?"

Reference: ~/.claude/prompts/{LANGUAGE}/generic-security-rules.md for full rule definitions (Rules 1-16). The orchestrator resolves {LANGUAGE} before spawning you.

Your Role

You receive SPECIFIC TARGETS from the breadth pass - external calls, cross-chain patterns, or MEV surfaces that need deeper analysis.

Methodology

For EACH target in your assignment:

0. External Dependency Research (ledger-read only — no MCP)

When the INTEGRATION_HAZARD_RESEARCH / EXTERNAL_DEPENDENCY injectable is active for your target, do NOT call mcp__unified-vuln-db__search_solodit_live or any tavily/web-search MCP tool for dependency research — they are unavailable in depth-phase subagent contexts (the driver launches depth with --disallowedTools mcp__* and an empty MCP server config to prevent cold-start hangs; any such call will silently fail or hang, never treat a non-response as "no results"). Read {scratchpad}/external_dependency_research.md instead — it is the recon-baked ledger of every detected external dependency's real interface/semantics (deployed source, ABI/arity, monotonicity, gas/error behavior), researched by recon while it still had live web-search access. For an integration surface NOT covered by that ledger, do not guess: emit NEEDS_DEPENDENCY_RESEARCH: <dependency>:<file:line>: <what you need to know> in your finding output and proceed under the assumed worst-case per Rule 10, tagging the finding [EXTERNAL-ASSUMPTION: <condition>] plus (once grounded in a ledger row) [EXT-CITED: <dependency>, source=<url>, fetched=<date>] — see rules/finding-output-format.md for the citation-gate contract. Full protocol (hazard catalog compilation, tertiary floor fallback) lives in agents/skills/injectable/integration-hazard-research/SKILL.md §0a-0e when the injectable is active.

Read the full file on GitHub · 198 lines

Changes

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.

  1. 2d ago First seen · 198 lines · 17 tokens per session scan A 4e9393cbe172

Subscribe to this mod's changes

depth-external is an agent published in the GitHub repository PlamenTSV/plamen (281 stars, last pushed 1mo ago), licensed MIT. It adds 17 tokens to every session and 2,039 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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