Record beta.4 work in the roadmap and todo lists

The unreleased section gains bounded compaction, apply_patch, web_fetch, the worker subagent, and the tool-detail transcript; web_fetch leaves the roadmap's future list.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

ROADMAP.md

@@ -105,15 +105,23 @@ same content is serialised inline instead of as an `item_reference`, so the depe
 pruned reasoning item disappears while the history survives. Compaction may shorten the
 history; it must not blank it.
 
+**Bounded compaction.** The fixed three-message tool window collapsed long transcripts to a
+handful of messages — a 405-message run kept two of 202 tool calls. Pruning now drops
+reasoning first and keeps the widest recent tool tail that fits a ladder, and the SDK's
+step-to-step message carry-over does the rest: the model keeps its record of what it ran. The
+turn reports one compaction event rather than one per step.
+
 **External registry.** `/registry` browses, searches, installs, and removes skills and plugins
 from an index over https. The two kinds are treated differently on purpose: a skill is prompt
 text and is shown in full before it joins your system prompt, while a plugin is a validated
 manifest of deny rules that the compiled guard evaluates. Loading code from a URL is declined
-outright — a plugin that can block tool calls could otherwise lie about blocking them.
+outright — a plugin that could block tool calls could otherwise lie about blocking them.
 
 **Interface.** Context shown as a percentage of the compaction threshold, amber from two
 thirds and red at 90, so a turn about to lose history says so first. Aligned command menu and
-registry tables, and `/skills` and `/plugins` name the origin of every entry.
+registry tables, and `/skills` and `/plugins` name the origin of every entry. Tool calls show
+their load-bearing arguments — the paths a batch read is about to pull in, the files a patch
+touches — and each result line carries an outcome summary.
 
 **Permission rules.** Approval moved from a list of tool names to rules matched against the
 call's subject: the command for `bash`, the path for a file tool. `bash` used to be a single
@@ -127,6 +135,22 @@ Surveyed Claude Code, Codex, opencode, and phi before writing it. Three of the f
 moved to per-pattern rules; the shape here is closest to opencode's, with the credential deny and
 the repeat guard taken from it directly.
 
+**`apply_patch`.** One atomic patch across files — add, update, move, delete — validated in
+full before anything is written, so a failure on the fourth file leaves the first three
+untouched. Permission rules match every path the patch touches, so denying `src/generated/*`
+catches a patch that includes one among five files.
+
+**`web_fetch`.** URL to markdown, size-capped, in a `net` tool set that is off unless asked
+for — it is the one tool that leaves the machine. HTTPS is required for public hosts, private
+and loopback addresses are refused, and redirects are re-checked one hop at a time so a public
+URL cannot redirect into the cloud metadata endpoint.
+
+**Writable worker subagents.** `task` gains a `worker` kind that holds the write tools and
+routes every write and command through the parent's approval gate — the same rules, the same
+prompt, the same session grants as a direct call. Without an approval channel the worker kind
+is not offered at all rather than silently downgraded to read-only. `explore` and `review`
+stay structurally read-only, and no subagent holds `web_fetch`.
+
 ---
 
 ## Next
@@ -178,12 +202,9 @@ decision, and there are no signatures. Publisher keys and a pinned digest per en
 
 ### `web_fetch`
 
-URL to markdown, in a `net` set that is off by default — it is the one tool that leaves the
+Shipped in beta.4 — see above. What remains declined: wrappers around a single bash line with
-machine.
+no added guarantee. `run_tests`, `typecheck`, `lint`, `build` are five tools of pure schema tax
-
+when the real commands are already in `AGENTS.md`.
-Declined: wrappers around a single bash line with no added guarantee. `run_tests`,
-`typecheck`, `lint`, `build` are five tools of pure schema tax when the real commands are
-already in `AGENTS.md`.
 
 ---
 

TODO.md

@@ -75,12 +75,6 @@ command, with `$ARGUMENTS`, `$1`, `` !`cmd` `` for shell output, and `@path` for
 - [ ] `` !`cmd` `` substituted before the prompt is sent, with the guard applied to it
 - [ ] Test: a command with a shell substitution reaches the model with the output inlined
 
-### `web_fetch`
-
-- [ ] URL to markdown, size-capped
-- [ ] Belongs to a `net` set, off by default — it is the one tool that leaves the machine
-- [ ] Test: a redirect is followed, an oversized body is truncated with a note
-
 ### Derive the tool-name lists
 
 `TOOL_SETS` and `MUTATING_TOOLS` both list names by hand. A tool added to one and forgotten
@@ -185,3 +179,5 @@ Kept for one release, then deleted.
       Rules match the call's subject, `always` grants a pattern rather than the tool, `.env` and
       `.pem` are refused on read, and an identical call repeated three times in a turn asks even
       when allowed
+- [x] **`web_fetch`**, size-capped HTTP(S) to markdown in the opt-in `net` tool set, with
+      redirect and private-address checks