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Piekwerk

Version-pinned AI coding agent config kits: AGENTS.md, CLAUDE.md, Cursor rules & Copilot instructions for 12 stacks. Built and validated by Piekwerk AgentConfig Studio.

Joined Joined on  Personal website https://piekwerk.gumroad.com/l/agentconfig-studio
A web page can plant AGENTS.md in your Downloads folder: Codex obeyed it in over 90% of attempts
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A web page can plant AGENTS.md in your Downloads folder: Codex obeyed it in over 90% of attempts

#ai #security #programming #devtools
1
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6 min read

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MCP servers v2.1.0 fixes 8 vulnerabilities: filesystem writes could escape allowed folders
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MCP servers v2.1.0 fixes 8 vulnerabilities: filesystem writes could escape allowed folders

#ai #mcp #security #devtools
1
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6 min read
Microsoft's Agensh runs 1,024 coding agents with no manager: one agent on the newer model beat the whole fleet
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Microsoft's Agensh runs 1,024 coding agents with no manager: one agent on the newer model beat the whole fleet

#ai #devtools #programming #opensource
1
Comments
6 min read
Claude Code 2.1.309 and 2.1.310 patched 15 guardrail bypasses in two days: deny rules, sandbox, and fail-open hooks
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Claude Code 2.1.309 and 2.1.310 patched 15 guardrail bypasses in two days: deny rules, sandbox, and fail-open hooks

#ai #claude #devtools #security
1
Comments
7 min read
20 of 21 agent configs just scored lower: what the Coding Agent Index v2.0 reset measures
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20 of 21 agent configs just scored lower: what the Coding Agent Index v2.0 reset measures

#ai #devtools #programming #testing
1
Comments
5 min read
Agent Skills moved to the Linux Foundation: 4 things SKILL.md authors should watch
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Agent Skills moved to the Linux Foundation: 4 things SKILL.md authors should watch

#ai #devtools #programming #productivity
1
Comments
5 min read
GitHub's Copilot default policy is enforcing itself through October 26: what to check before it chooses for you
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GitHub's Copilot default policy is enforcing itself through October 26: what to check before it chooses for you

#ai #devtools #programming #productivity
1
Comments
4 min read
Claude Code's new safety_event finally shows which guardrail blocked your agent
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Claude Code's new safety_event finally shows which guardrail blocked your agent

#ai #claude #devtools #programming
5
Comments
4 min read
GitHub's PDD Kit proves agent-written Rust correct: 5 steps and 3 limits
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GitHub's PDD Kit proves agent-written Rust correct: 5 steps and 3 limits

#ai #github #devtools #programming
2
Comments 3
5 min read
GitHub's package firewall went into preview: npm gets checked before your agent installs it
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GitHub's package firewall went into preview: npm gets checked before your agent installs it

#ai #security #devtools #programming
1
Comments 2
5 min read
OpenAI's 12-hour prompt cache is live: split your agent context into two TTLs
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OpenAI's 12-hour prompt cache is live: split your agent context into two TTLs

#ai #openai #devtools #programming
2
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5 min read
model: haiku stopped meaning one thing. Pin the exact model id.
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model: haiku stopped meaning one thing. Pin the exact model id.

#ai #claude #devtools #programming
1
Comments
3 min read
Codex 0.161 flipped the default model to GPT-6.1 Sol. If you never set model, you already switched.
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Codex 0.161 flipped the default model to GPT-6.1 Sol. If you never set model, you already switched.

#ai #openai #devtools #programming
1
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4 min read
20 things AI coding agents get wrong: the config rules that stop them
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20 things AI coding agents get wrong: the config rules that stop them

#ai #programming #devtools #claude
1
Comments
4 min read
Claude Haiku 5.5 is GA in GitHub Copilot: 4 config surfaces decide what runs your subagents
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Claude Haiku 5.5 is GA in GitHub Copilot: 4 config surfaces decide what runs your subagents

#ai #programming #devtools #productivity
1
Comments
4 min read
Claude Code 2.1.295 Adds onFailure block: Hooks Can Fail Closed Now, If You Ask
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Claude Code 2.1.295 Adds onFailure block: Hooks Can Fail Closed Now, If You Ask

#ai #claude #devtools #security
1
Comments
5 min read
Claude Code 2.1.294 Fixed Guards That Silently Failed: Hooks That Allowed, Rules That Never Loaded
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Claude Code 2.1.294 Fixed Guards That Silently Failed: Hooks That Allowed, Rules That Never Loaded

#ai #claude #devtools #security
1
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5 min read
Claude Code 2.1.292 Asks Your MCP Servers for 2026-07-28: I Probed the Official Servers, All Four Answered 2025-11-25
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Claude Code 2.1.292 Asks Your MCP Servers for 2026-07-28: I Probed the Official Servers, All Four Answered 2025-11-25

#ai #mcp #devtools #programming
1
Comments
5 min read
Superpowers at 296k stars: I read all 15 skills, and the whole methodology is 170 KB of markdown
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Superpowers at 296k stars: I read all 15 skills, and the whole methodology is 170 KB of markdown

#ai #claude #devtools #opensource
Comments
5 min read
Your AI agent's config files have secrets in the clear: a 22-rule scanner that finds them
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Your AI agent's config files have secrets in the clear: a 22-rule scanner that finds them

#ai #security #devtools #programming
1
Comments
5 min read
Hugging Face measured it: the same model scores 33% or 62% depending on the harness
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Hugging Face measured it: the same model scores 33% or 62% depending on the harness

#ai #machinelearning #devtools #programming
1
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5 min read
JetBrains Air puts 5 agents in one IDE: 4 config checks before you install the EAP
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JetBrains Air puts 5 agents in one IDE: 4 config checks before you install the EAP

#ai #devtools #programming #productivity
1
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4 min read
NVIDIA measured it: coding agents scored 19% without a spec file, 100% with one
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NVIDIA measured it: coding agents scored 19% without a spec file, 100% with one

#ai #devtools #programming #opensource
1
Comments
4 min read
DeepSeek Harness added a Claude Code Mods compatibility layer: it's a subset test, not a port
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DeepSeek Harness added a Claude Code Mods compatibility layer: it's a subset test, not a port

#ai #devtools #programming #opensource
1
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4 min read
Slack Code went live today: 5 agents, one channel, and the rules files that keep them aligned
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Slack Code went live today: 5 agents, one channel, and the rules files that keep them aligned

#ai #productivity #devtools #programming
1
Comments
5 min read
OpenAI's MCP Extensions put plugins in ChatGPT's sidebar: 13 features and the portability bill
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OpenAI's MCP Extensions put plugins in ChatGPT's sidebar: 13 features and the portability bill

#ai #openai #mcp #devtools
1
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5 min read
OpenAI shipped Codex plugins: your agent config surface just moved out of the repo
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OpenAI shipped Codex plugins: your agent config surface just moved out of the repo

#ai #openai #devtools #mcp
1
Comments
5 min read
Claude Code 2.1.289 patched 4 deny-rule bypasses: your npm channel decides whether you have them
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Claude Code 2.1.289 patched 4 deny-rule bypasses: your npm channel decides whether you have them

#ai #claude #security #devtools
1
Comments
4 min read
Pi 1.0 reversed on MCP and shipped Codemode: where tool composition actually runs now
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Pi 1.0 reversed on MCP and shipped Codemode: where tool composition actually runs now

#ai #mcp #devtools #programming
1
Comments
5 min read
Cursor's self-hosted runners feel on-prem: here's where the agent loop still runs
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Cursor's self-hosted runners feel on-prem: here's where the agent loop still runs

#ai #cursor #devtools #devops
1
Comments
5 min read
A 7-line Claude Code mod overrode a deny rule: the plugin audit that matters now
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A 7-line Claude Code mod overrode a deny rule: the plugin audit that matters now

#ai #claude #security #devtools
1
Comments
5 min read
Copilot can click your desktop now: 4 guardrail details before you type /computer on
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Copilot can click your desktop now: 4 guardrail details before you type /computer on

#ai #githubcopilot #devtools #security
2
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4 min read
Claude Code 2.1.287 ships mods: what in-process hooks change for your rules and guards
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Claude Code 2.1.287 ships mods: what in-process hooks change for your rules and guards

#ai #claude #devtools #security
1
Comments
5 min read
NVIDIA moves the agent boundary into the kernel: what OpenShell GA means for your rules file
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NVIDIA moves the agent boundary into the kernel: what OpenShell GA means for your rules file

#ai #security #devtools #programming
1
Comments
5 min read
Microsoft put GitHub Copilot's engine in a chat app: where agent instructions live now
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Microsoft put GitHub Copilot's engine in a chat app: where agent instructions live now

#ai #microsoft #devtools #programming
Comments
5 min read
AWS shipped agent skills for its MCP server: 5 details worth copying
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AWS shipped agent skills for its MCP server: 5 details worth copying

#ai #aws #devtools #mcp
Comments
5 min read
Docker's Kit spec packages agent authority as an OCI image: 5 details worth copying
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Docker's Kit spec packages agent authority as an OCI image: 5 details worth copying

#ai #devops #devtools #security
1
Comments
5 min read
Claude Code now wraps up at the 5-hour limit: what it fixes and the checkpoints it can't replace
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Claude Code now wraps up at the 5-hour limit: what it fixes and the checkpoints it can't replace

#ai #claude #devtools #programming
Comments
6 min read
Claude Code 2.1.283 ships a config linter: what /doctor prompt-audit changes for your CLAUDE.md
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Claude Code 2.1.283 ships a config linter: what /doctor prompt-audit changes for your CLAUDE.md

#ai #claude #devtools #programming
4
Comments
5 min read
OpenAI's agent split a token into pieces to beat secret scanning: prompts lost, permissions won
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OpenAI's agent split a token into pieces to beat secret scanning: prompts lost, permissions won

#ai #security #devtools #programming
1
Comments
4 min read
Claude Code 2.1.282 stops repos turning on your telemetry: what a cloned repo can still set
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Claude Code 2.1.282 stops repos turning on your telemetry: what a cloned repo can still set

#ai #claude #devtools #security
Comments
5 min read
Muse Code goes multi-agent by default: 6 permission details worth stealing
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Muse Code goes multi-agent by default: 6 permission details worth stealing

#ai #programming #devtools #security
Comments
5 min read
Semaphore's sem-ai puts CI/CD in the agent loop: 4 design choices worth copying
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Semaphore's sem-ai puts CI/CD in the agent loop: 4 design choices worth copying

#ai #devops #devtools #programming
Comments
4 min read
Claude Code switched its default to Opus 5.5: what the silent flip does to your token budget
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Claude Code switched its default to Opus 5.5: what the silent flip does to your token budget

#ai #claude #devtools #programming
1
Comments
4 min read
Skills over MCP is final: what 3 methods and per-file digests change for your agents
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Skills over MCP is final: what 3 methods and per-file digests change for your agents

#ai #mcp #programming #devtools
Comments
5 min read
Stop writing rules: 6 problems your agent config should not solve
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Stop writing rules: 6 problems your agent config should not solve

#ai #programming #devtools #opinion
Comments
3 min read
What survives compaction: testing what agents remember after a handoff
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What survives compaction: testing what agents remember after a handoff

#ai #claude #cursor #programming
Comments 3
3 min read
7 reasons your agent ignores your rules (with fixes that stuck for me)
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7 reasons your agent ignores your rules (with fixes that stuck for me)

#ai #claude #cursor #programming
Comments
3 min read
Running 4 agents in parallel: the state files that keep them sane
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Running 4 agents in parallel: the state files that keep them sane

#ai #claude #programming #productivity
Comments
3 min read
I measured the token cost of 9 MCP servers: 41k tokens before the first prompt
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I measured the token cost of 9 MCP servers: 41k tokens before the first prompt

#ai #mcp #programming #devtools
Comments
3 min read
Config files vs hooks: where agent enforcement actually belongs
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Config files vs hooks: where agent enforcement actually belongs

#ai #claude #programming #devtools
1
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3 min read
A free, validator-tested agent config kit for Next.js: what's inside
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A free, validator-tested agent config kit for Next.js: what's inside

#nextjs #ai #webdev #programming
Comments
3 min read
Why your agent bills spike mid-task: the prefix cache, explained with numbers
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Why your agent bills spike mid-task: the prefix cache, explained with numbers

#ai #claude #programming #performance
Comments
3 min read
I counted the lines in 12 agent config kits: what fits in 300
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I counted the lines in 12 agent config kits: what fits in 300

#ai #programming #devtools #metrics
Comments
3 min read
Your AGENTS.md is lying: how configs drift and how to catch it
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Your AGENTS.md is lying: how configs drift and how to catch it

#ai #devtools #programming #git
Comments
3 min read
What makes a good AI coding rule (and what makes agents ignore rules)
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What makes a good AI coding rule (and what makes agents ignore rules)

#ai #programming #claude #cursor
Comments
3 min read
Versioning your agent configs: stop treating instructions as disposable
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Versioning your agent configs: stop treating instructions as disposable

#ai #devtools #programming #git
Comments
2 min read
Team-standardizing AI coding agents: getting five developers to identical behavior
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Team-standardizing AI coding agents: getting five developers to identical behavior

#ai #programming #devtools
Comments
2 min read
Managing agent config across multiple repositories without losing your mind
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Managing agent config across multiple repositories without losing your mind

#ai #devtools #programming #git
Comments
2 min read
Writing Cursor rules that actually fire: activation modes explained
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Writing Cursor rules that actually fire: activation modes explained

#cursor #ai #programming #devtools
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3 min read
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