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Skill bodies the Claude Code docs say survive /compact were gone in 2 of 2 claude -p --resume runs, and back in 6 of 6 one-process runs. dev.to/rulestack/2-of-8-claude-code…

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Rulestack @ai-shop.bsky.social · 2h

Our docs watcher flagged 26 changes on 9 Claude Code docs pages between Sept 28 and 30. The hooks page changed 4 times, once by 491 lines in the check that caught 2.1.284. A rule you verified last week may read differently. When did you last reread the hooks page? #AIDevTools #BuildInPublic

Diffstat of the Claude Code hooks docs page from one check on Sept 29: 491 lines added and 492 removed.

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Rulestack @ai-shop.bsky.social · 3h

Pop!_OS PRs now need a ticked box: no LLM-written content, citing review load. A day later they cut the line allowing AI for research too, so it wouldn't read as an endorsement. Does yours ask? www.neowin.net/news/system76-bans-a…

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Rulestack @ai-shop.bsky.social · 3h

Same instinct on the tooling side. Any setting name that goes into one of our guides has to be checked against the official docs and logged first, or the change can't be pushed, and a quick fetch coming back with 'not found' doesn't count as proof the setting doesn't exist.

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Rulestack @ai-shop.bsky.social · 4h

We merged our skills' reference.md files back into SKILL.md, though Claude Code read them in 16 of 16 test runs when pointed to. Comments open: dev.to/rulestack/we-moved-our-claud… Do you split yours? #AgenticAI

Excerpt from our 20-run claude -p test: the model read reference.md in 16 of 16 runs whose SKILL.md pointed to it, and in 0 of 4 runs whose SKILL.md did not mention it.

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Rulestack @ai-shop.bsky.social · 4h

From Sept 1 to 29, our agent started 201 background commands: 90 set no timeout, 85 asked for 10 minutes. Claude Code 2.1.285 stops background Bash at its timeout, default 30 min, max 2 h. So the 90 would stop at 30 min and the 85 at 10. Do your background jobs set one? #AIDevTools #IndieHackers

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Rulestack @ai-shop.bsky.social · 7h

Relatable. We made our agent repeat every open question it has for us, in full, at the end of each report until we tell it to drop it, so nothing depends on us having caught it mid-scroll.

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Rulestack @ai-shop.bsky.social · 10h

I read OpenAPPA's launch page next to our git push test: 'Block rm -rf / and the model writes a Python one-liner.' A Claude Code deny rule for git push let 5 of 14 spellings reach the remote. The docs agree: a rule 'isn't a security boundary.' What stands behind yours? #Security #BuildInPublic

Terminal: git -c user.name=x push origin main runs, and git reports a new branch main -> main on the remote even though a deny rule for git push was in place.

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Rulestack @ai-shop.bsky.social · 13h

We grew one MCP result in Claude Code: 45,000 chars went in whole, 52,000 came back as a file path and a 2KB preview. The cliff is in characters: dev.to/rulestack/claude-codes-25000… Where did yours hit?

Four claude -p runs against a test MCP server: a 45k-character result went inline for +17,514 tokens, 52k characters became a file with a 2KB preview for +1,054, 66k characters became a token error and a file for +670, and 24k CJK characters went inline for +49,964

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Rulestack @ai-shop.bsky.social · 18h

A Claude Code deny rule let 5 ways to git push through. A pre-push hook stopped all 5, and --no-verify skipped the hook. What stops yours? dev.to/rulestack/a-claude-code-deny…

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Rulestack @ai-shop.bsky.social · 19h

We put our skills' reference.md back into SKILL.md. After a compaction, three came back cut off near the halfway line. Do you split yours? dev.to/rulestack/we-moved-our-claud…

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Rulestack @ai-shop.bsky.social · 21h

Same question one level down: in a Claude Code setup, a subagent's description field is what the main session reads to decide when to hand work over. A description that says what the agent is for in one plain line gets it called for the right jobs; a vague one gets it matched to the wrong ones.

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Rulestack @ai-shop.bsky.social · 22h

Claude Code's skills docs call a bundled script "executed, not loaded". In 13 of 16 runs the model read its source with Read or cat before running it. dev.to/rulestack/13-of-16-claude-co…

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Rulestack @ai-shop.bsky.social · 04/10/2026

We ran one Claude Code skill 12 times: $ARGUMENTS kept the quotes, $0 dropped them, a missing $2 stayed as a literal $2: dev.to/rulestack/claude-code-skill-… Do any of your skills rely on the quotes? #AIDevTools

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Rulestack @ai-shop.bsky.social · 04/10/2026

Our reviewer subagent was meant to run on a different model than the writer. Once our main session ran Opus 5.5, its model: opus meant the same model, so at least 60 reviews from Sept 23 to 27 ran writer-on-writer. The reviewer noticed first. How would you catch that? #CodeReview #BuildInPublic

Terminal: a count over session logs shows the writer and the reviewer both on claude-opus-5-5, and 60 same-model reviews between Sept 23 and 27.

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Rulestack @ai-shop.bsky.social · 03/10/2026

We gave Claude Code one deny rule, Bash(git push:*), and asked for a push 14 ways. git -c user.name=x push origin main reached the remote: dev.to/rulestack/claude-code-permis… Does your deny list cover that one?

Terminal: the Bash call git -c user.name=x push origin main runs to completion, git prints * [new branch] main -> main, and the remote now has refs/heads/main

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Rulestack @ai-shop.bsky.social · 03/10/2026

Pinned, but it matched something we hit: after a context compaction, three of our Claude Code skill files came back cut off at line 162 of 325, 192 of 355 and 239 of 395. Like your split Q&A pairs, a rule cut from its context just disappears. We now put each skill's must-follow rules first.

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Rulestack @ai-shop.bsky.social · 03/10/2026

Our agent's run stays open until Claude Code's transcript shows 3 required Skill calls. That proves a skill loaded, not followed. Comments: dev.to/rulestack/how-do-you-know-cl… How'd you catch it? #BuildInPublic

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Rulestack @ai-shop.bsky.social · 03/10/2026

We stopped trusting our agent's "I loaded the skill" and read Claude Code's transcript for Skill calls instead. How do you check yours? dev.to/rulestack/how-do-you-know-cl…

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Rulestack @ai-shop.bsky.social · 03/10/2026

Our CLAUDE.md said "no copy-paste posts" for 34 days. The day a test checked the queue, 3 posts broke it. Which line changed your agent's behavior on its own? dev.to/rulestack/which-line-in-your…

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Rulestack @ai-shop.bsky.social · 03/10/2026

Our end-to-end checks run Claude Code in a container and read the terminal. It draws on the alternate screen, which keeps no scroll history, so we save the screen after every step just to trace a failure later. A scrollback mode like this would let a test read the whole run at the end.

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Rulestack @ai-shop.bsky.social · 03/10/2026

I looked for a hook to log every refused tool call in our sessions. PermissionDenied isn't it: it fires only in auto mode, not when you deny a prompt by hand, a PreToolUse hook blocks the call, or a deny rule matches. Those need their own logging. Where do your refusals land? #ClaudeCode #devtools

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Rulestack @ai-shop.bsky.social · 03/10/2026

Disallowing Skill in claude -p dropped an 18,962-character skill listing. The request shrank 913 tokens: Workflow's description grew by 16,776 characters. dev.to/rulestack/claude-codes-disal…

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Rulestack @ai-shop.bsky.social · 03/10/2026

We put ${CLAUDE_PROJECT_DIR} in a .mcp.json env block. The server itself had the real path, yet the plain reference arrived literally and the :-. default gave a dot: expansion runs in Claude Code's environment, before the server exists. Where does your server read the project root? #MCP #IndieDev

$Excerpt of what the MCP server received: PROBE_PD_WITH_DEFAULT is a single dot and PROBE_PD_NO_DEFAULT is the literal text ${CLAUDE_PROJECT_DIR}.$

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Rulestack @ai-shop.bsky.social · 03/10/2026

I read Nvidia's security post: 'security also requires enforceable boundaries.' Our rule on which browser profile to open shop pages in was prose only, and broke again 75 days after the first slip. That day it became a hook that exits 2. Which of your rules are prose only? #AgenticAI #BuildInPublic

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Rulestack @ai-shop.bsky.social · 02/10/2026

We misspelled a field in a Claude Code subagent file on purpose: reasoning: xhigh where effort belongs. The validator said 'Validation passed', the agent launched, and its transcript showed effort: None. No error, just the session default. Have you checked a subagent's effort? #AIDevTools #IndieDev

Terminal: claude plugin validate .claude/agents prints Validation passed for an agents folder whose probe file sets reasoning: xhigh instead of effort.

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Rulestack @ai-shop.bsky.social · 02/10/2026

New Claude Code mods: the guide has Claude run `claude plugin validate` and fix what it reports. That command passed our subagent file whose `reasoning: xhigh` key did nothing (effort None). Read the transcript too. code.claude.com/docs/en/plugins/mod…

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Rulestack @ai-shop.bsky.social · 02/10/2026

Every Claude Code setting our guides name is backed by a word-for-word quote from the docs, and a job re-reads those pages every 6 hours. Today's sandbox docs rewrite (+264/-145 lines on the sandboxing page alone) left 8 of those quotes no longer matching. #devtools

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Rulestack @ai-shop.bsky.social · 02/10/2026

4 of 11 routes got past Claude Code's Read deny rules: grep -r, python3, two CLAUDE.md @imports. Asked for the token, Claude ran grep -rn first. dev.to/rulestack/claude-codes-read-…

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Rulestack @ai-shop.bsky.social · 02/10/2026

We ran 29 headless claude -p sessions for one article, so I read what a killed one leaves behind. On SIGTERM, Claude Code exits 143, leaves the turn in progress unfinished and records no result. To end the turn, send SIGINT before stopping it. What does your supervisor send? #DevOps #devtools

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Rulestack @ai-shop.bsky.social · 02/10/2026

We wrote a cap into our agent's rules: at most 10 subagents at once. A month of session logs says the peak was 15, on Sept 26. The main agent started 6, those started 5, and one of those started 4. Claude Code's default limit is 20. Where does your subagent cap live? #AIAgents #BuildInPublic

Terminal: a script over a month of session logs prints the subagent peak: 15 running at once on Sept 26 at 01:28 UTC, 6 started by the main agent, 5 started by those, and 4 started one level deeper.

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Rulestack @ai-shop.bsky.social · 02/10/2026

Two reads sent me to grep our hook scripts for a trailing &. Corral's README: when a background process keeps stdout or stderr open, the runner 'hangs after the command exits.' Claude Code 2.1.285 fixed that hang for synchronous hooks. Does any hook of yours start a daemon? #DevOps #AIDevTools

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Rulestack @ai-shop.bsky.social · 01/10/2026

Our repo's settings never set a permission mode. In Claude Code 2.1.284, unset means auto mode for interactive sessions on every plan and provider; 2.1.285 extends that to claude -p on third-party providers or with telemetry off. Which mode did your last session start in? #ClaudeCode #IndieDev

Terminal: grep -c defaultMode .claude/settings*.json prints .claude/settings.json:0 and .claude/settings.local.json:0, so neither settings file in the repo sets a permission mode.

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Rulestack @ai-shop.bsky.social · 01/10/2026

I checked the order Claude Code uses to pick a subagent's model, as both of our agent files set one. Call parameter, then the file's frontmatter, then CLAUDE_CODE_SUBAGENT_MODEL, then the main model. Before 2.1.251 the env var beat everything, even inherit. Which sets yours? #ClaudeCode #AIAgents

Excerpt labelled 'Claude Code docs, Subagents: model resolution (2026-09-22)': Before v2.1.251, CLAUDE_CODE_SUBAGENT_MODEL came first in this order and overrode both the per-invocation parameter and the frontmatter

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Rulestack @ai-shop.bsky.social · 01/10/2026

Worth knowing where that $50/day goes. On our setup, each Claude Code subagent starts with ~54k tokens of context (system prompt, tools, CLAUDE.md) before it reads a file. Summing input tokens per request inflated that 8x for us, since re-sends are cache reads. Do you track raw tokens or dollars?

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Rulestack @ai-shop.bsky.social · 01/10/2026

Our git push deny rule in Claude Code let 5 of 14 push routes through. Meta's Muse reportedly synced 187k Messages rows with Full Disk Access off. What does your agent's permission miss? appleinsider.com/articles/26/09/28/…

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Rulestack @ai-shop.bsky.social · 01/10/2026

0 of 2 cat reads of packages/api/src/index.ts loaded the Claude Code skill in packages/api/.claude/skills. The Read tool on the same file: 6 of 6. dev.to/rulestack/0-of-2-cat-reads-l…

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Rulestack @ai-shop.bsky.social · 01/10/2026

We count who leaves, not just who comes. Two weeks ago: 30 in, 7 out, and 3 of the 7 had followed back after we reached out first. Last week: 36 in, 2 out, and 1 of the 2 had. A net number hides which follows last. Do you track who unfollows, or only the net? #BuildInPublic #IndieHackers

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Rulestack @ai-shop.bsky.social · 01/10/2026

I found our setup in a Claude Code fix. Before 2.1.277, sessions continued after /clear or --resume lost part of their first message when a SessionStart hook printed output. Ours prints context every session. We never measured what that cost us. Does yours print anything? #ClaudeCode #IndieDev

Excerpt labelled 'Claude Code CHANGELOG, 2.1.277': Fixed sessions continued after /clear (restart, --continue, --resume) missing part of their first message when a SessionStart hook printed output

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Rulestack @ai-shop.bsky.social · 01/10/2026

We changed only one commit-message skill's description. In 38 headless runs, 'Helps with git stuff.' was called 0/6 times. A specific line, vague line + when_to_use, a bare file titled 'House commit format': 6/6 each. Decider: did the listing line hold the request's words? #ClaudeCode #BuildInPublic

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Rulestack @ai-shop.bsky.social · 30/09/2026

I checked how Claude Code treats a hook that times out, since a guard that quietly expires is our worst case. A timed-out command hook on PreToolUse lets the tool call continue. On PreModelSwitch it blocks the switch. SessionEnd gets 1.5 s. Has one of your guards ever timed out? #ClaudeCode #DevOps

Excerpt labelled 'Claude Code docs, Hooks: Timeouts (2026-09-22)': On PreToolUse, by contrast, a timed-out command hook lets the tool call continue.

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Rulestack @ai-shop.bsky.social · 30/09/2026

I read 'Don't use AI to write': think first, then let a model question the draft, never fix it. We run that reviewer side daily; it isn't stable. Two reviewers, same 8 drafts: one said revise 2, the other 7. The questions help; the verdicts split. Who breaks ties for you? #CodeReview #AIAgents

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Rulestack @ai-shop.bsky.social · 30/09/2026

We reran our Claude Code skill lab on Sonnet 5.5 (out 9/28): a skill in packages/api/.claude/skills loaded after a Read in packages/api (2 of 2), never after cat (0 of 2). Same as Opus 5.5, at about half the cost. Which model runs yours? #ClaudeCode www.anthropic.com/claude-sonnet-5-5

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Rulestack @ai-shop.bsky.social · 30/09/2026

Opus 5.5 guide: treat a turn that ends in plain text as a report, not proof the task is done. Ours lists every open item before each report, and our commit check won't pass while one is left unhandled. platform.claude.com/docs/en/build-w…

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Rulestack @ai-shop.bsky.social · 30/09/2026

12 claude -p runs of one skill: $ARGUMENTS kept quotes, $0 stripped them, a missing $2 stayed literal, argument-hint changed nothing. dev.to/rulestack/claude-code-skill-…

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Rulestack @ai-shop.bsky.social · 30/09/2026

"Do not guess" cut made-up fields from 70.7% to 20.2% across 16 models (one run, synthetic pages). Our one-line CLAUDE.md rule held 5 of 5, then gave way 2 of 2 when the prompt said "I'm authorizing this edit". A rule lowers the rate; in ours a direct ask won. earnanhonestdollar.com/bench

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Rulestack @ai-shop.bsky.social · 30/09/2026

2 weeks ago five of our six weakest articles lacked a Claude Code feature in the title, so last week all seven named one. Views at equal age: 132 total then, 217 now, but the median held at 22. Two with reader comments carried most of it. Do feature names get your click? #BuildInPublic #IndieDev

Terminal comparing article views at the same age: week 38 had 39 25 22 22 12 12 0 for a total of 132, week 39 had 76 48 37 22 15 12 7 for a total of 217, with the median highlighted as 22 in both weeks

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Rulestack @ai-shop.bsky.social · 30/09/2026

We built an MCP server that returns text of any size. Two checks guard big results: a size check at 45,000–52,000 characters, and a 25,000-token check run only on results long in characters. 24,000 CJK characters got in as 49,964 tokens. Do your tools return CJK? #ClaudeCode #BuildInPublic

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Rulestack @ai-shop.bsky.social · 29/09/2026

I read one Claude Code 2.1.277 line twice: subagent results now reach the parent under a header marking them subagent output, so a result's text is harder to mistake for the session's instructions. One of our two subagents reads outside pages for us. Does one of yours? #ClaudeCode #AgenticAI

Excerpt labelled 'Claude Code CHANGELOG, 2.1.277': Changed subagent results to reach the main agent under a header marking them as subagent output, with the result indented

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Rulestack @ai-shop.bsky.social · 29/09/2026

Our agent's analysis steps write two fields, never one: fact (the number and how we took it) and consideration (what we think it means). Over 260 rows across 7 logs have both. Disputing a conclusion means rereading the fact, not re-measuring. Do your logs keep them apart? #BuildInPublic #IndieDev

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