DST-03　Shell configuration modification

block 0 hits here sandbox-verified

① What it stops

Agent attempted to modify shell startup configuration (persistence mechanism)

Shell startup files execute on every terminal; never let an agent append to them unreviewed.

② Criteria

Item	Value
Severity	critical
Category	destructive
Gate	Gate 4 behavior (destructive/persistence)
Criterion type	tool_call
Applies to	Write、Edit、Bash

File path patterns

\.bashrc
\.zshrc
\.profile
\.bash_profile

Command patterns

>>\s*~[/\\]\.(bashrc|zshrc|profile)
echo.*>>.*\.(bashrc|zshrc|profile)

Generated directly from rules/default.json — never hand-written or paraphrased.

③ Real hits

2026-09-24T01:44:12+08:00 ✗ block [DST-03] tool: Write　exit code: 2 criterion: path hit: .bashrc

Triggered in a disposable sandbox project using the real hooks/pre_tool_use.py — the same method as challenge/generate_challenge.py. All 24 rules verified this way (24/24).

Zero hits in the 13-day ledger on this machine — we do not post a sample. Zero hits means this machine never hit it, not that the rule is dead; effectiveness is covered by the sandbox trigger above.

④ False positives & exemptions

Built-in exclude patterns are listed under ②. Four exemption mechanisms exist globally (declared workspace roots, policy path whitelist, path-suspect alert-only, exclude patterns); counts on this machine are published on the Chinese page and in Limits.

⑤ Boundaries

Boundary
Criterion type	tool_call
Applies to	Write、Edit、Bash
Platform	all platforms
Case sensitivity	Measured: insensitive (`RM -RF` is blocked like `rm -rf`)
Path normalisation	Measured: effective (`./sub/../.env` is blocked)
Scripts not parsed	An absolute path outside the project mentioned in a Bash command is alerted, not blocked — `scripts are not parsed (THREAT_MODEL Non-goals)`
Failure posture	fail-open; best-effort, not a hard security boundary

⑥ Reproduce

grep -h "DST-03" .psl/audit/*.jsonl | head python challenge/generate_challenge.py python challenge/verify.py

Cite this page

Antinel AgentState. DST-03 Shell configuration modification — rule detail. https://antinel.com/en/agentstate/rules/DST-03/ (accessed YYYY-MM-DD)

Antinel. (2026). DST-03 Shell configuration modification — rule detail. AgentState. https://antinel.com/en/agentstate/rules/DST-03/

BibTeX

@misc{antinel_en_agentstate_rules_DST_03,
  title        = {DST-03 Shell configuration modification — rule detail},
  author       = {{Antinel}},
  year         = {2026},
  url          = {https://antinel.com/en/agentstate/rules/DST-03/},
  note         = {claim tier: measured}
}

Claim tier: measured　采集时刻：2026-09-23T22:41:18+08:00