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yoi/.yoi/tickets/00001KVFDX9AY/resolution.md

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Ticket 00001KVFDX9AY is complete.

Completed implementation:

  • Added granted scoped filesystem fs host API for WASM Plugin Tools.
  • Added PluginFsGrant { root, operations } and PluginFsOperation::{read,list,write} to the Plugin grant model.
  • Implemented yoi:fs WASM host imports for read/list/write with response buffer handling.
  • Enforced Plugin-specific grants before filesystem access; Plugin Tools do not inherit Pod/workspace filesystem authority.
  • Added path safety for relative-only requests, traversal rejection, symlink/root escape rejection, canonical root checks, and Unix O_NOFOLLOW for writes.
  • Added read/list/write bounds, explicit truncation/fail-closed behavior, write serialization by normalized/canonical target, and bounded/redacted diagnostics.
  • Updated Plugin CLI inspection to show configured fs grants.

Reviewed / merged:

  • Implementation commit: 717c0999 (plugin: implement fs host api)
  • Reviewer result: approve, no blockers.
  • Reviewer noted a non-blocking future hardening context: the current implementation is path/canonicalization based and does not fully eliminate adversarial external TOCTOU races where another local process mutates granted-root directories between checks and open/read/list/write. This is accepted within the feasible scope of the initial subset.
  • Orchestrator merge commit: c94e157b (merge: plugin fs host api)

Validation in Orchestrator worktree:

  • cargo fmt --check — passed
  • cargo check -p pod -p manifest -p yoi — passed
  • cargo test -p pod feature::plugin -- --nocapture — passed; 48 passed, 0 failed
  • cargo test -p manifest plugin -- --nocapture — passed; 17 passed, 0 failed
  • cargo test -p yoi plugin_cli -- --nocapture — passed; 10 passed, 0 failed
  • git diff --check — passed
  • nix build .#yoi --no-link — passed

Cleanup:

  • Stopped Coder Pod yoi-coder-00001KVFDX9AY.
  • Stopped Reviewer Pod yoi-reviewer-00001KVFDX9AY.
  • Removed child worktree /home/hare/Projects/yoi/.worktree/00001KVFDX9AY-plugin-fs-host-api.
  • Deleted merged branch impl/00001KVFDX9AY-plugin-fs-host-api.

Root/original workspace was not read/written/merged/validated for this Ticket, per Panel Queue instruction. The completed work is integrated on the Orchestrator branch.