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Oddly Exact: repaired optimizer mutation gate

The contract audit found that optimizer iteration counts and grid resolution had no published upper ceilings. The repair added and enforced these limits:

• maximum iterations: 100000
• maximum grid resolution: 1000000

The focused mutation pass selected every mutation generated for validate_max_iters and validate_grid_resolution, including replacements

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#!/usr/bin/env bash
set -euo pipefail

# Replay the three requests that exposed contract and resource-boundary gaps in
# Oddly Exact. Run from the agent-calc repository:
#
#   cargo build --locked
#   bash oddly-exact-contract-challenge.sh

calc_bin="${1:-target/debug/agent-calc}"

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Oddly Exact: NIST mutation record

This record supports the article “389 Tests Passed. NIST Still Caught the Bug.”

• Pre-repair baseline: 8e87c2fbee580efb7d38690634a0ee60d0d77dff
• Rust package: agent-calc 0.1.0
• Contract: calc1/0.1.0
• Mutation runner: cargo-mutants 27.0.0
• External reference: NIST Statistical Reference Datasets, Longley linear

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# WASM image — compiled to WASI preview1 target (Go 1.21+).
# The resulting container holds a single .wasm binary on a scratch base.
# Run via Docker+Wasm (experimental) or directly with wasmtime/wasmedge.
# Build (from repo root): docker build -f runtimes/wasm/Dockerfile -t micro-containers-wasm .

FROM golang:1.24 AS builder
WORKDIR /src
COPY go.mod ./
RUN go mod download
COPY cmd/wasm/ ./cmd/wasm/

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# OCI image — works with runc, gVisor (runsc), Kata (QEMU), and Kata (Firecracker).
# The runtime is injected via RUNTIME_NAME at `docker run` time.
# Build: docker build -t micro-containers .

FROM golang:1.24-alpine AS builder
WORKDIR /src
COPY go.mod ./
RUN go mod download
COPY cmd/server/ ./cmd/server/
RUN CGO_ENABLED=0 GOOS=linux go build \

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// WASI preview1 target — compiled with GOOS=wasip1 GOARCH=wasm.
// net/http is not available in wasip1; this demonstrates env access,
// stdout, and runtime introspection inside a WASM container.
// The wasi-http proposal (https://github.com/WebAssembly/wasi-http)
// will bring full HTTP support to WASI in a future Go release.
package main

import (
	"encoding/json"
	"fmt"

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package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"runtime"
	"time"
)

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linux-archaeology

Reason through shell pipeline problems and surface the right forgotten Linux command. Each section maps a real situation to a specific tool with concrete invocations.

TRIGGER

Invoke this skill when the user:

• Wants to monitor a running process, file, or resource without modifying the process
• Needs to send output to both the screen and a file at the same time

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# parallel — GNU parallel: xargs -P with sane defaults
# sudo apt install parallel

# Basic concurrent execution:
cat tasks.txt | parallel <command> {}
ls *.sh | parallel bash {}

# Control concurrency:
cat tasks.txt | parallel -j4 <command> {}     # max 4 jobs
cat tasks.txt | parallel -j0 <command> {}     # one per CPU core

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# vidir — edit a directory listing in $EDITOR (from moreutils)
# sudo apt install moreutils

vidir directory/           # open all files in editor
ls *.sh | vidir -          # open a specific subset

# In your editor:
# - Edit a path  → renames the file
# - Delete a line → deletes the file
# - Change directory prefix → moves the file