Files
stack/packages/mosaic/framework/tools
Hermes Agent 2a2a87251a
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wrapper-guard: read the command the shell will run, and stop losing the client behind option values
Round-four review, three more absence-driven allows.

1. The guard read the command as TYPED. A backslash before a newline is removed
   before anything else happens, so an endpoint token split across the join
   (`.../iss\` + newline + `ues/1/comments`) executed the comments endpoint while
   the literal token never appeared in the text. Continuations are now joined
   before every check, because the joined form IS the command. This is the same
   defect as the split-across-variables case, minus the excuse: there the token
   genuinely does not exist until the shell expands it, here it was sitting in
   the input the whole time and the guard chose the wrong reading of it.

2. Transparent prefixes take option VALUES. `sudo -u root curl` hid a live write
   because `root` was a word the prefix list did not know. Enumerating option
   grammars per prefix is the wrong game, so what is skipped is an option and at
   most one value for it, plus a bare duration for `timeout` — never an
   arbitrary word. `xargs echo curl ...` therefore stays ALLOWED, because there
   the command is echo and the client is its argument.

3. `find -exec` runs the client. It opens command position the same way an
   operator does, and now reads that way.

All seven reviewer repros are fixtures, each with its counter-case in the
allowed direction: a continuation inside a heredoc document stays a document,
`xargs echo curl` stays allowed, `sudo apt-get install curl` stays allowed, a
prefixed READ stays allowed. 48/48, and the 18-command ordinary sweep still
blocks none.

Gates: sanitization, resident budget, test enumeration, tools-index (self-test
4/4, git suite 100%), prettier.
2026-08-12 17:46:25 -05:00
..