Retain structural tools and durable input on the current harness API

crates/tinyagents-harness-tools/Cargo.toml

@@ -28,6 +28,10 @@ tinyagents-harness = { path = "../tinyagents-harness", version = "3.0.0", defaul
 tinyagents-tasks = { path = "../tinyagents-tasks", version = "3.0.0", default-features = false, optional = true }
 tinyinference-llm = { path = "../../vendor/tinyinference/crates/tinyinference-llm", version = "0.5.0", optional = true }
 tinytools = { path = "../../vendor/tinytools/crates/tinytools", version = "0.6.0" }
+# Pure structural parsing; native code-tool I/O uses this crate's filesystem gate.
+tinytools-code = { path = "../../vendor/tinytools/crates/tinytools-code", version = "0.6.0", optional = true }
+# Same-directory staging for atomic structural edits.
+tempfile = { workspace = true, optional = true }
 tinyagents-orchestration = { path = "../tinyagents-orchestration", version = "3.0.0", default-features = false, optional = true }
 tokio = { workspace = true, features = ["sync", "time", "macros", "rt", "rt-multi-thread"] }
 tracing = { workspace = true }
@@ -48,6 +52,7 @@ skills = []
 state-block = ["goals", "todos", "dep:tinyinference-llm"]
 subagents = ["dep:tinyagents-orchestration", "dep:tinyagents-tasks", "dep:tinyinference-llm"]
 fs = ["dep:base64", "dep:fs2", "dep:glob", "dep:libc", "dep:log", "dep:regex", "dep:walkdir", "tokio/fs", "tokio/io-util"]
+code = ["fs", "dep:tinytools-code", "dep:tempfile"]
 net = ["dep:futures-util", "dep:log", "dep:reqwest", "dep:sha2", "tokio/fs", "tokio/io-util"]
 exec = ["dep:rustix", "tokio/fs", "tokio/io-util", "tokio/process"]
 media = []

crates/tinyagents-harness-tools/README.md

@@ -20,6 +20,12 @@ the generic artifact-filing wrapper at `tinyagents_harness_tools::media`, and
 `tinyagents_harness_tools::plan_review`. These features do not change the
 default set.
 
+The opt-in `code` feature enables `fs` and exposes six deferred structural tools
+through `code_tools` / `code_tools_with_options`. They use the pure
+`tinytools-code` parser and this crate's existing `fs::filesystem::FsGate` and
+`fs::file_state`, so structural writes share the host's filesystem policy and
+stale-read tracking. See the [structural tool contract](src/code/README.md).
+
 ## Public modules and tools
 
 - `goals` provides `GoalStore`, `GoalTool`, observer notifications, atomic
@@ -39,6 +45,8 @@ default set.
   `tinyagents_orchestration::subagent::SubAgentJobRegistry`.
 - `thread_locks` provides the public `ThreadLockMap` concurrency primitive.
 - `fs` provides filesystem tools and file-state operations in `fs`.
+- `code` provides bounded syntax inspection and revision-checked structural
+  edits behind the same filesystem gate.
 - `net` provides network tools in `net`.
 - `exec` provides `ExecTool`, `InstallTool`, process timeout utilities, and
   host-supplied execution ports in `exec`.