evo-gw-matched-filter-engine

evo-gw-matched-filter-engine is a skill for Claude Code, Codex from OpenLAIR/OpenSkill. It costs 54 tokens per session (681 once invoked), scanned A, original, Apache-2.0.

A gravitational-wave data-processing toolkit for reading GWF detector files, cleaning the signal, creating waveform templates, and measuring matched-filter SNR. Matched filtering compares detector data with a proposed waveform to find a likely signal.

In plain words
What is it for?
Use it to condition PyCBC data, estimate a power spectral density (a description of noise by frequency), generate supported waveforms, and calculate peak matched-filter SNR.
Why use it?
It removes the repeated setup needed to prepare detector data, estimate its noise pattern, and compare it with waveform templates. It provides a consistent way to obtain the strongest matching signal and its time.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to condition PyCBC data, estimate a power spectral density (a description of noise by frequency), generate supported waveforms, and calculate peak matched-filter SNR.

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Install with agentmods
npx agentmods add skills/openlair/openskill/evo-gw-matched-filter-engine
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.

Any agent
npx skills add OpenLAIR/OpenSkill --skill evo-gw-matched-filter-engine
Clone the repo
git clone --depth 1 https://github.com/OpenLAIR/OpenSkill

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for evo-gw-matched-filter-engine

README.md
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Your own site
<a href="https://agentmods.dev/skills/openlair/openskill/evo-gw-matched-filter-engine"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-gw-matched-filter-engine/github.svg" alt="Measured on agentmods" height="20"></a>

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Your own site · 80×15
<a href="https://agentmods.dev/skills/openlair/openskill/evo-gw-matched-filter-engine"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-gw-matched-filter-engine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 681 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00054 $0.00681
Opus 5 $0.00027 $0.00341
Sonnet 5 $0.00011 $0.00136
Haiku 4.5 $0.00005 $0.00068

Measured yesterday against content hash c9e46978990b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

evo-gw-matched-filter-engine 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 yesterday.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/engine_utils.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

tasks-evolved/gravitational-wave-detection/environment/skills/evo-gw-matched-filter-engine/SKILL.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

evo-gw-matched-filter-engine

Core GW data processing and matched filtering engine for PyCBC-based gravitational wave detection.

Functions

read_and_condition_data(gwf_path, channel)

Reads a GWF frame file and conditions the data:

  1. Read entire frame (no time bounds needed)
  2. Highpass filter at 15 Hz
  3. Crop 2s from both ends (FIR wraparound removal)
  4. Resample to 2048 Hz

estimate_psd(conditioned_data)

Estimates PSD using Welch's method (4s segments), interpolates to data resolution, applies inverse spectrum truncation (4s max filter, 15 Hz cutoff).

generate_template(approximant, mass1, mass2, delta_t, f_lower=20.0)

Generates a waveform template using get_td_waveform. Returns hp (plus polarization). Supported approximants: SEOBNRv4_opt, IMRPhenomD, TaylorT4.

compute_matched_filter_snr(conditioned_data, psd, hp, f_lower=20.0)

Performs matched filtering:

  1. Resizes template to data length
  2. Cyclic shifts template (hp.start_time)
  3. Runs matched_filter with PSD weighting
  4. Takes abs() of complex SNR
  5. Crops edges (8s start, 4s end)
  6. Returns (peak_snr, peak_time)

find_peak_snr(gwf_path, channel, mass1, mass2, approximant, conditioned_data=None, psd=None)

High-level function combining all steps. Accepts pre-conditioned data/PSD to avoid recomputation.

Usage

import sys
sys.path.insert(0, '/app/environment/skills/evo-gw-matched-filter-engine/scripts')
from utils import read_and_condition_data, estimate_psd, generate_template, compute_matched_filter_snr, find_peak_snr

# Option 1: All-in-one
snr, time = find_peak_snr('data.gwf', 'H1:TEST-STRAIN', 30, 30, 'SEOBNRv4_opt')

# Option 2: Reuse conditioned data across many templates
data = read_and_condition_data('data.gwf', 'H1:TEST-STRAIN')
psd = estimate_psd(data)
hp = generate_template('SEOBNRv4_opt', 30, 30, data.delta_t)
snr, time = compute_matched_filter_snr(data, psd, hp)

Key Parameters

  • Highpass cutoff: 15 Hz
  • Resample rate: 2048 Hz
  • Data crop: 2s both ends
  • PSD Welch segment: 4s
  • Inverse spectrum truncation: 4s max filter, 15 Hz cutoff
  • Template f_lower: 20 Hz
  • SNR crop: 8s start, 4s end
  • Only hp polarization used for single-detector filtering

Read the full file on GitHub · 64 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. yesterday First seen · 64 lines · 54 tokens per session scan A c9e46978990b

Subscribe to this mod's changes

evo-gw-matched-filter-engine is a skill published in the GitHub repository OpenLAIR/OpenSkill (88 stars, last pushed yesterday), licensed Apache-2.0. It adds 54 tokens to every session and 681 once invoked, about $0.0003 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 2026-09-11.

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