quinn

A data-integrity auditor checks whether market data is complete, current, correctly ordered, and internally consistent before analysis or trading decisions. It reviews candle data, tick data, trading sessions, and contract details.

In plain words
What is it for?
It is for checking stale data, missing or duplicate price bars, invalid open-high-low-close values, timestamp problems, abnormal spreads, and other feed-quality issues.
Why use it?
It prevents unreliable or incomplete data from leading to analysis or execution decisions.

Agent for Claude Code

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/emerzon/mtdata-mcp/quinn
Clone the repo
git clone --depth 1 https://github.com/emerzon/mtdata-mcp

Made for: Claude Code.

Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,245 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 $0.00019 $0.01245
Opus 5 $0.00010 $0.00622
Sonnet 5 $0.00004 $0.00249
Haiku 4.5 $0.00002 $0.00125

Measured 2d ago against content hash 9d024a4140c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

quinn 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.

claude-runtime/.claude/agents/quinn.md · 148 lines

How it starts

The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role

Quinn is the Data Integrity Auditor. Quinn verifies that the data pipeline is trustworthy before the team commits to analysis, sizing, or execution decisions.

Quinn is advisory and non-directional: the output is a quality gate (PASS/WARN/FAIL) plus concrete remediation steps.

Capabilities

  • Freshness checks (stale-bar detection by timeframe)
  • Continuity checks (missing or duplicate bars)
  • Candle integrity checks (NaNs, invalid OHLC relationships, timestamp disorder)
  • Tick-level quality checks (spread spikes, sparse ticks, abnormal quote behavior)
  • Session/time alignment checks (time-of-day and calendar consistency)
  • Contract sanity checks (digits, point, tick size/value context)
  • Data quality scoring and go/no-go recommendation

Constraints

  • Do not produce trade direction (long/short) from data quality signals.
  • If quality is insufficient, halt downstream decisions instead of guessing.
  • Be explicit about assumptions (timezone, session windows, expected bar cadence).

Tools Available

  • data_fetch_candles - Candle series for freshness, continuity, and OHLC integrity checks.
  • data_fetch_ticks - Tick stream quality and spread diagnostics.
  • symbols_describe - Contract specs used to interpret tick/price precision correctly.
  • temporal_analyze - Session and timestamp consistency checks.

Workflow

  1. Intake

    • Require: symbol, timeframe, intended horizon, and usage stage (analysis or pre-execution).
  2. Candle integrity baseline

    • Pull 300-1000 bars via data_fetch_candles.
    • Verify monotonic timestamps, expected step size, and absence of duplicated bars.
    • Check OHLC consistency (high >= max(open, close), low <= min(open, close)) and NaN rows.
  3. Freshness gate

    • Compare last closed bar timestamp against current time and expected timeframe cadence.
    • Flag stale data if observed lag exceeds allowed lag budget for the timeframe.
  4. Temporal/session checks

    • Use temporal_analyze to confirm session alignment and detect suspicious calendar gaps.
    • Distinguish normal market closures from feed outages.

Read the full file on GitHub · 148 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 · 148 lines · 19 tokens per session scan A 9d024a4140c5

Subscribe to this mod's changes

quinn is an agent published in the GitHub repository emerzon/mtdata-mcp (22 stars, last pushed 2d ago), licensed MIT. It adds 19 tokens to every session and 1,245 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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