The closed WebErrorCode union leaked fetch-transport details (redirect,
too-large, content-type) into the seam's shared vocabulary and made web
the only seam with a closed error-code union. Drop it and let WebError
carry an open code: string like LlmError/SubagentError; document the
codes grouped by owner (seam-neutral vs dsh-web-fetch-local transport).
Addresses tianyicui's leaky-abstraction review comment on WebErrorCode.
Replace the "bag of optional fields" tool-presentation types
(ToolCallPresentation / ToolResultPresentation / ToolTerminal) with a
card-tagged discriminated union — the standing FIXME(tool-presentation).
A tool declares one render intent per call/result and the ACP bridge
switches on `card`:
ToolCallView = generic | terminal | diff
ToolResultView = generic | terminal
The `diff` card is new: fs write/edit now emit an ACP {type:'diff'}
content block (an editor's inline diff), which the old shapes could not
express. The bridge also relativizes a file card's title against the
session cwd (mirroring claude-agent-acp's toDisplayPath) while keeping
locations/diff paths raw, and derives the no-capability fenced console
fallback from a terminal result's output. read gains the window-in-title
(`Read foo.txt (5 - 8)`) and an always-set location line, matching the
reference adapter field-for-field.
Migrates all three producer families (tool-fs, tool-bash, tool-todo) and
the sole consumer (the ACP bridge) together — the source does not compile
piecewise. Adds snapshot coverage for the terminal _meta path (a new
capability-advertising scenario) and re-records the fs goldens to show the
diff cards. Applied-hunk (result-time, context-line) diffs need a new
result/event shape and are a follow-up.
RFC: docs/rfc/implemented/architecture/2026-07-02-tool-render-intent-union.md
Load dsh-fs-local + dsh-fs-policy + dsh-tool-fs after tool-todo (mirroring the
acp-agent wiring), and steer the system prompt to prefer read/write/edit for
file ops with bash for shell/tests/search. Update the welcome line and the
FIXME(config-comments) bash note.
Doc sweep now that both demos ship the fs tools and the seam resolves per-session
cwd: architecture.md and the event-gate RFC no longer say the demos do file ops
through bash / that no config wires the tools; the coding-agent + examples
READMEs and the AGENTS.md layout blurb list the fs tools; the acp-agent README
drops the launch-dir caveat (per-session cwd now works, so the server can launch
anywhere).
(stdio-agent is single-session, so fs-local's cwd = process.cwd() is the
workspace. Keyless boot smoke is blocked locally by an unrelated inotify
watcher-limit ENOSPC that also hits demo:echo; the config parses and the same fs
stack boots green in the acp-agent snapshot tier.)
The fs tools rendered as generic cards (title = tool name, raw file content) in
an ACP editor. Give them tool-owned presentation like bash/subagent have:
- read → title "Read <path>", kind read, offset/limit as rawInput
- write → title "Write <path>", kind edit
- edit → title "Edit <path>", kind edit, a clipped old→new rawInput summary
Add a provider-neutral `locations: { path, line? }[]` to ToolCallPresentation —
the files a call reads/modifies — so a capable editor can follow along / jump to
the file (read carries its offset as the line). The ACP bridge forwards it onto
the wire `tool_call` (ResolvedCallPresentation + call() + the tool_call build in
streamSessionEventUpdate). This flips the `locations` cell in the ACP feature
matrix to supported. The SDK already carries `tool_call.locations`
(ToolCallLocation `{ path, line? }`), so no ACP types leak into dsh-tools.
presentResult is intentionally omitted: it only receives `{ content, isError }`,
not the write/edit outcome, so titling by create-vs-overwrite or replacement
count would mean parsing the model-facing text — the static title stays.
Tests: pure presentCall assertions for all three tools incl. locations and the
edit rawInput clip; a bridge test drives the REAL fs tools through ToolPresenter
and asserts locations reaches the wire tool_call (proven to fail without the
forwarding line). New withFs harness option + dsh-fs devDeps on dsh-acp.
The ACP bridge gives each session its own workspace (SessionHeader.cwd), and
dsh-tool-bash already resolves a bash workdir against it. But ctx.fs.resolve(path)
took no caller context and dsh-fs-local resolved every relative path against a
fixed config.cwd (process.cwd() at plugin load) — so in the ACP demo `write
foo.txt` and `bash cat foo.txt` hit different directories the moment an editor
opens any project other than the server's launch dir.
Thread the session cwd into resolution, mirroring dsh-tool-bash: widen
FileSystem.resolve to resolve(path, opts?: { cwd?: string }); dsh-fs-local bases
a relative path on opts.cwd ?? config.cwd (absolute paths ignore it); the
read/write/edit tools derive it via a shared sessionCwd(exec) helper
(exec.agent?.session.header.cwd). The provider stays free of dsh-agent/dsh-session
— the tool projects exec → cwd and hands over a plain string, per the
explicit-at-seams convention. Backward compatible (the arg is optional).
Tests: fs-local resolve(path,{cwd}) bases relative on the passed cwd / ignores it
for absolute; tool integration writes/reads/edits in a session cwd != config.cwd
and verifies the file on disk (proven to fail on the pre-fix no-cwd path). Fakes
that stood in a bare {session:{}} now carry a header so sessionCwd doesn't throw.
RFC in docs/rfc/implemented/architecture/2026-07-02-fs-per-session-cwd.md.
Master's new tool-schema catalog boots every tool-* package and hard-errors if
one is absent from the manifest. Add the dsh-tool-fs entry (boot dsh-fs-local to
satisfy the injected `fs`, harvest read/write/edit), note that dsh-fs-policy adds
the read-before-write/edit gate without changing schemas, and regenerate
docs/tool-catalog/tools.md. Update the collectToolCatalog test's expected tool
set to include the fs tools.
Round-1 Codex review findings on the tool-schema catalog:
(A) The shipped coding-agent / acp-agent configs load dsh-tool-subagent twice —
as `subagent` (spawn backend) and `subagent_fork` (fork backend) — so the model
sees a `subagent_fork` tool the catalog never mentioned, while the intro claimed
to list "the exact name the model receives". The registered name is the plugin's
load-time `toolName` config, not a package fact, so rather than bake an
example-app config into a packages-scoped generator, add a per-package deployment
`note`: the subagent entry now records the `subagent_fork` alias and points at the
leaf configs. Intro and RFC scope reworded to state the unit is the package (at
its default config), with aliases noted — no longer overclaiming. A test asserts
the note names `subagent_fork`, covering the config-driven-name path.
(B) collectToolCatalog only disposed the context on the success path; a throw from
mount/schemas() after earlier plugins mounted would leak the fiber. Move
`ctx.fiber.dispose()` into a `finally` per the repo's dispose-to-quiescence rule.
Rename per review naming decisions:
- package dsh-file-context → dsh-fs-policy (dir, package name, plugin name,
tsconfig refs, importers, type-equiv manifest, generated catalog + module-graph)
- events fs/write-expectation → fs/write-intent, fs/edit-expectation → fs/edit-intent
(fs/observed unchanged); type FsWriteExpectation → FsWriteIntent, "expectation"
wording → "intent" throughout
- exported FileContextExec → FsPolicyExec
Make the implemented RFCs describe what shipped, not the superseded designs:
the 2026-06-17 capability-seam + tool-schemas RFCs no longer place policy on
ctx.fs or use full/partial-view authorization, and the fsspec RFC's ctx.fileContext
service prose is rewritten to the fs/* event-gate reality (freshness-based auth).
Sharpen docs/rfc/implemented/AGENTS.md: a rename is a fact to fix IN PLACE — the
"new RFC" escape hatch is for macro decision reversals only, not renames.
Code fixes from review:
- fsio.ts resolveLocalTarget/probe translate ENOTDIR (a parent path segment is a
file) into the structured FsError taxonomy instead of leaking a raw Node error;
resolve reports FS_NOT_FOUND, probe reports absent. Regression tests proven to
fail on the unfixed code.
- tool-fs HMR test now asserts prompt sections (not just tool schemas) are
withdrawn on disposal.
- fs/observed is a plain (unguarded) ctx.emit: correct the fs-policy comment,
filesystem.md, and tool-fs module doc that wrongly claimed the tool "contains"
a throwing listener; a throw surfaces as the tool's isError result.
- drop the false "loaded by the default product config" claim (no config wires
the fs tools yet), the duplicate ctx.bash service-map row, the stale
FileReadRequest catalog link-map entry, and the fs/fs README EOF blank line;
correct the dsh-fs package.json description.
Add docs/tool-catalog/tools.md, a generated reference of every model-facing
tool a shipped `packages/*/tool-*` plugin contributes (name, description,
JSON-Schema parameters) — the third generated catalog alongside the cordis
events/services and core-data-structures catalogs.
Unlike the cordis catalog (a pure source-AST pass), this generator BOOTS each
tool plugin on a real cordis Context and reads `ctx.tools.schemas()`, because a
tool schema is not statically knowable: `todo_write` builds its enum with a
runtime spread, descriptions are string-concatenated, `subagent`'s name is
config-driven, and MCP tools register raw JSON Schema without `defineTool`. A
completeness guard globs the on-disk `tool-*` packages and fails if any is
absent from the boot manifest, restoring the "nothing silently omitted"
property booting would otherwise lose. `verify-tool-catalog` runs inside
`doc-sync`, so the artifact cannot drift.
The boot-over-AST decision and the discovered-inventory / hand-written-recipe
split are recorded in a process RFC.
- ACP/SSE: show full English name in parens on first occurrence
- fixture: drop 测试夹具 gloss, keep descriptive note
- manifest: keep English, drop 首次出现可写 clause
Address @tianyicui's minor-revision review on PR #110:
- Make every BasicCompactConfig knob required except `auto` (defaults
true): there is no data yet to justify default thresholds/budgets, so
a consumer states each value explicitly. Drop the DEFAULTS export and
the constructor's `= {}` default; example cordis.yml, the compaction
e2e, the README, and every test construction site now pass a complete
config (tests route through a `cfg()` helper).
- Add a TODO on estimateContentTokens: char/4 is coarse; replace with a
real tokenizer or post-response usage feedback in a follow-up.
- Add a TODO on the agent/pre-step `fullSystemPrompt` param flagging it
as a smell on a generic per-step seam (compaction is its sole
consumer); a `//` line comment so it stays out of the generated catalog.
The Events intro carried "The harness declares N events across M scopes."
and the Services intro "The N `ctx.<key>` services the harness provides."
Both embed counts the generator recomputes from source, so every branch
that adds an event or service rewrites that one line — a guaranteed merge
conflict against any sibling branch that also touched the catalog, for
prose that adds nothing a reader can't get by scanning the page.
Remove the count clauses from the generator's render() and regenerate the
catalog. The freshness gate (verify-cordis-catalog) stays green.
Use maxTokens as the provider generation cap and remove the confusing stored-summary max config.
Strip reasoning blocks before storing compaction summaries, reject non-shrinking summaries, and retry bounded re-compaction when the surface remains over threshold.
Add config validation for numeric and type-shaped knobs plus unit and real-API e2e coverage for reasoning-capable summarization.
Honor cancellation and disposal around async pre-step setup before the loop can open a step or call the model.
Route compaction summarization through agent/request so router agents can select the model, and remove the stale model argument from agent/pre-step.
Document serial events and the approximate convergence bound, regenerate the Cordis catalog, and add regression coverage for router compaction, HMR cleanup, and assembly/pre-step interruption.
Clarity-first revisions from review:
- keep English for ambiguous terms (Cordis, fork, harness, schema, spawn,
manifest, transcript, compaction, dispose)
- first-use glosses for CLI, Function Calling, HMR, fiber
- inference/reasoning carry the English in parens to disambiguate
- memory distinguishes 记忆 (agent memory) vs 内存 (resource usage)
- plugin -> 插件; add a separate mod -> 模组 row
- 中英搭配 note on translated terms (wire format, adapter contract)
Add @deepseek-ai/dsh-web-search-deepseek: a WebSearchProvider that calls
DeepSeek's Anthropic-compatible Messages API with the native
web_search_20250305 server tool and parses the structured
web_search_tool_result blocks into the ctx.web seam's WebSearchResult.
- Namespace plugin (inject: ['web']), no default export — registers into
ctx.web like dsh-llm-deepseek registers into ctx.llm.
- Strict mode: a response with no web_search_tool_result block throws
WEB_PROVIDER_ERROR rather than scraping URLs from model prose.
- Reuses $DEEPSEEK_API_KEY; baseURL defaults to the Anthropic-compatible
base (api.deepseek.com/anthropic/v1) and does NOT reuse
$DEEPSEEK_BASE_URL, which belongs to the chat-completions LLM adapter.
- snippet joined from text-block citations; sources deduped by url.
- Two-stage build layout (outDir lib/types) matching the other web
packages; registered in tsconfig.json, tsconfig.build.json, knip.json,
and docs/module-graph.md.
Two cohesion cleanups on the filesystem tool package:
- Fold window.ts + types.ts + formatReadOutput into one cordis-free
read-render.ts. Line windowing, the FileReadOutcome shape, and output
formatting are one concern (the read tool's rendering); splitting them across
three files added no value. read.ts is now just the tool (schema + I/O).
- Drop observe.ts and emit fs/observed with a plain ctx.emit in read/write/edit.
The event is contractually a synchronous, side-effect-only recorder
(file-context's listener is a WeakMap.set), so the per-call try/catch guarded
against a contract violation that cannot happen under the shipped listener —
defensive code for an impossible case. The event contract (dsh-fs JSDoc,
README, RFC) is updated to state the fire-and-forget semantics plainly.
Add @deepseek-ai/dsh-tool-todo (a new packages/todo/ group): a model-facing
todo_write(todos: [{content, status}]) tool with whole-list-replace semantics.
Each call appends the full list as a todo/write event to the calling agent's
session log; the current list is the most recent such event (last-write-wins).
Single-owner — a non-agent caller is rejected. Beyond the schema's
type/required/enum checks, execute rejects empty/duplicate content and more than
one in_progress task, narrowing the loosely-typed args into a real TodoItem[].
Both UIs render off the existing session/event: the stdio UI prints a glyphed
checklist; the ACP bridge maps the list to a `plan` sessionUpdate (todosToPlan
synthesizes the priority ACP requires; status maps 1:1). Wired into the
coding-agent, acp-agent, and snapshot example configs with a system-prompt nudge.
Tests: unit (schema, validation, append/replace, no-agent rejection, presentCall,
HMR-safety, Loader export-shape guard), full-loop integration through the agent
loop, the ACP todosToPlan mapping + stream-update arm, the stdio render arm, and
a session/load replay that re-emits the plan. New-group TS wiring added to
tsconfig.base/json/build. RFC + a doc-inventory sweep (architecture, packages
README, AGENTS layout, cookbook group list, example READMEs) ship with it.
The todo-plan ACP snapshot scenario is recorded separately (needs an API key).
Codex Phase 1 review: the event JSDoc described Phase 2 consumers (the
todo_write tool, stdio printing, ACP plan mapping) as current state, and put an
@mode tag on a SessionEventMap member. @mode is for first-class Cordis
`interface Events` entries the catalog generator reads — this event rides the
existing session/event emit and has no catalog row, so the tag was wrong.
Trim the JSDoc to the event's own contract (snapshot data shape,
last-write-wins, not-a-surface-event) and drop @mode; phrase TodoItem in terms
of its own purpose rather than a not-yet-present tool.
Add the TodoItem type and a todo/write SessionEventMap variant carrying the
whole todo list as a snapshot (last-write-wins on replay). It is NOT a
SurfaceEventType: it produces no LLM message and never reaches
deriveMessages(), so it carries no surfaceOp and stays off the surface — it is
durable, replayable UI state that rides the existing session/event emit.
Tests cover the snapshot-clone-on-append contract, last-write-wins, the
not-on-surface guarantee, and a seeded replay round-trip. Docs: session.md
gains the TodoItem type-equiv block + the event member; core.md's variant count
goes to twelve; the type-equiv manifest gains TodoItem.
Adapt the four fs packages to master's single-tsconfig build convention
(lib/types outDir + types path + files allowlist), brought in by the merge.
While doing so, drop dsh-tool-fs's /read//write//edit subpath plugins. They
were the only subpath-export package in the tree and forced bespoke tsdown,
tsconfig path, package.json files, and workspace-constraint handling that no
sibling tool package (e.g. dsh-tool-bash) carries, for a focused-deployment
use case no consumer needed. dsh-tool-fs is now a single root plugin that
registers read/write/edit, mirroring dsh-tool-bash; the per-tool registration
helpers stay internal modules the root composes. The file-context event-gate
RFC is amended to record the narrowed scope.
- edit tool: add the read-before-edit requirement to the model-facing prompt
(with the just-created/edited-this-session exception), matching write's
guidance so the model doesn't only learn it via a failed FS_NOT_OBSERVED call.
- fsspec-style-fs-seam RFC: correct the acceptance criteria that still claimed
a ctx.fileContext service and a fileContext inject — the landed design is the
fs/* event gate with the tool injecting fs.
- filesystem-tool-schemas RFC: replace the stale "prior full file state"
edit requirement with version-freshness wording (any windowed read authorizes
a fresh edit; no partial-view flag).
Correct the filesystem-wiring claims flagged by codex: no default/example
config wires the fs tools yet (the demo agents do file ops through bash), so
the docs and RFC no longer assert that "the default product config loads
dsh-file-context". They now state the intended stance — a deployment that
loads the fs tools is expected to also load dsh-file-context for
read-before-write/edit.
Invert the tool↔policy control flow per the file-context event-gate RFC.
dsh-tool-fs becomes the executor — it reads/writes/edits through ctx.fs
directly, owns read windowing, and dispatches fs/write-expectation /
fs/edit-expectation (single-slot waterfalls) plus a contained fs/observed
emit. dsh-file-context drops its ctx.fileContext service and becomes a pure
event-gate plugin (observed-state + read-before-edit + version-guarded
write/edit, decided on those events). The provider's version guard becomes
optional so ctx.fs alone is a complete unconstrained text-storage seam:
removing the policy plugin gracefully loses the policy instead of breaking
the tool at a service-injection boundary.
Register the five web packages in the root tsconfig.json project graph
(master's typecheck moved to `tsc -b tsconfig.json` and dropped the
separate tsconfig.typecheck.json), and regenerate the module graph and
cordis catalog so they reflect the web packages on master.
- Re-validate redirect targets through validateFetchUrl before following, so a
same-origin Location carrying credentials (or a non-http(s)/over-long URL)
cannot bypass the transport hygiene a direct request enforces.
- Treat only DROPPED bytes as truncation: a body exactly at maxResponseBytes is
no longer falsely flagged truncated (which emitted a spurious footer).
- Honor the declared response charset: parse the Content-Type charset and decode
with it (rejecting unsupported labels as WEB_UNSUPPORTED_CONTENT_TYPE) instead
of always assuming UTF-8 and returning replacement characters.
- Catalog the web seam vocabulary in docs/core-data-structures/web.md with
type-equiv blocks + manifest entries, per the core-data-structures rule.
Introduce web access as a first-class capability seam so the model-facing
web tools stay stable while backends change. dsh-web owns ctx.web as a
provider registry with registration-order-independent selection and the
WebError taxonomy; dsh-web-search-exa, dsh-web-search-perplexity, and
dsh-web-fetch-local register capabilities into it; dsh-tool-web is the sole
owner of the model-facing web_search/web_fetch schemas, prompt sections, and
HTML-to-markdown presentation. Search and fetch are deliberately one seam.
Providers ship as namespace plugins that register into ctx.web (like an
LlmAdapter into ctx.llm), not key-owning services, since multiple search
providers cannot each own the key. Tool registration follows product
enablement, not backend availability, so load order/credentials never enter
the model contract; the seam resolves the provider at execution time and
surfaces a structured WebError otherwise.
Moves the RFC to implemented/ amended to match what shipped. Example/app
configs are intentionally not wired yet (RFC migration step 6).
Record the freshness token observed AFTER the read (re-stat post-read, falling
back to the routing stat if the file vanished) so the version returned/recorded
matches the bytes returned — a writer racing between the routing stat and the
read can no longer make a follow-up edit spuriously stale. Stream reads when the
backend reports no size, so a size-less backend never buffers a large file
whole. Update the cordis-catalog link map to the current filesystem API symbols
(FileContextExec/FileReadRequest/FileReadOutcome/FsInfo/FsWriteExpectation).
Implements the split-the-filesystem-seam RFC. ctx.fs shrinks to a text-storage
provider seam (resolve/stat/readText/streamText/writeText/editText with branded
FsTargetKey/FsVersion and an explicit FsWriteExpectation); the new
dsh-file-context package owns the model-facing policy (read windowing,
observed-state, write/edit freshness) as the concrete ctx.fileContext service.
Authorization is now freshness-based rather than full/partial view: a windowed
read records the file version and authorizes a later edit when the file is
unchanged, removing the dead-end where reading lines 100-150 of a large file
could not edit line 120. editText stays a provider primitive so version guard +
literal match + atomic rewrite remain one critical section, and the stale check
runs before matching so a stale edit reports FS_STALE_VERSION. tool-fs injects
fileContext, never reaching around to ctx.fs (the no-bypass contract).
The compaction e2e never exercised compaction: its window/fixture combo
(contextWindow 8000, thresholdRatio 0.5 → threshold 4000; four small files)
peaked at ~1389 estimated tokens, so compactIfNeeded declined every pre-step
and compact/start never landed. Shrink the window (contextWindow 2400 →
threshold 1200; retainTokens 500 + summarizationMaxTokens 300 = 800 < 1200,
convergence holds) and grow the fixture to six files so a couple of bash steps
reliably cross the threshold. Verified compaction fires and the suite passes
across repeated real-API runs.
Sync docs left stale by the landed compaction work: list compaction.e2e.ts and
keyless-smoke.e2e.ts in the coding-agent README (and fix the wrong "Both
self-skip" count), add compaction to the examples with-key inventory, and
replace the hypothetical compaction/marker / "future plugin" naming in the
session README, session types JSDoc, and the core-data-structures catalog with
the real compact/start, compact/summary, compact/end events.
Codex round 1 CBR-003: several docs still described compaction as an
`agent/request` waterfall concern, and the implemented compaction RFC
claimed "No changes to dsh-session or dsh-invariants" while the diff
changed both.
- Package READMEs / JSDoc (agent, agent-loop, system-prompt, compact,
compact-basic): compaction now lives on the serial `agent/pre-step`
seam (fired after turn/start, before step/start); the structural guard
is tool-pairing balance (`isToolPairingBalanced`), not step-alignment;
the convergence bound is strict (`>=` rejects).
- architecture.md / core-data-structures/compaction.md: same seam +
predicate + dispatch-mode updates; regenerated cordis catalog.
- Implemented compaction RFC, updated in place to describe shipped
reality: the seam is `agent/pre-step` (@mode serial) fired before
step/start; alignment is surface tool-pairing balance; the convergence
invariant rejects `>=`; and the "no dsh-session/dsh-invariants changes"
claim is corrected — dsh-session gains the tool-pairing predicate and
dsh-invariants drops its `start <= end` replace assertion (a positional
replace makes start > end normal).
Codex round 1 CBR-001: a head-anchored compaction checkpoint was
mis-classified by the log-position step-alignment scan, so a second
auto-compaction over a checkpoint-headed surface silently failed.
Root cause: `isStepAlignedStart/End` scanned the LOG by seq, but a
`replace` op lands a checkpoint at a high log seq whose SURFACE position
is the head — its log neighbours (the open step's assistant/message) are
not its surface neighbours, so the forward scan wrongly reported mid-step.
Fix, per the agreed direction:
- Replace the two log-position predicates with one surface-anchored
helper `isToolPairingBalanced(nodes, events, beforeSeq)` in
`dsh-session` (renamed step-boundary.ts → tool-pairing.ts). A cut is
balanced when no unanswered tool-call precedes it on the surface; a
region is collapsible iff both edges are balanced cuts. The open-tail
and free-node cases fall out of the same counter. It also throws on a
corrupt surface (a tool/result with no matching call).
- Move compaction off the in-step seam to a new "pre-step" seam fired
after turn/start and before step/start, so a compaction's log-only
compact/* records and its replacement node land cleanly OUTSIDE any
step (the honest structure crash-safety relies on). Renamed the event
agent/pre-request → agent/pre-step and switched its dispatch from
parallel → serial (listeners mutate the surface as a side effect;
serial isolates them so concurrent appends can't interleave). Extended
the catalog generator to accept @mode serial.
Regression coverage: a real-loop test driving an auto-compaction asserts
the landed checkpoint is a balanced cut on both sides; unit tests pin the
checkpoint case, the mid-step injection case, multi-call steps, and the
corrupt-surface guard. Proven red on the old log-position logic.
Reform the compaction blueprint so a runaway turn survives and the design
stops drifting across review rounds:
- Drop in-flight-turn protection ("layer 2"). Retention is a uniform tail→head
whole-unit walk; the only structural guard is step-alignment. A single turn
that alone exceeds the window now compacts its own early closed steps instead
of being retained verbatim (the failure mode that motivated this).
- Move auto-compaction off the agent/request waterfall onto a new awaited
agent/pre-request loop seam, fired before history derivation. Compaction
mutates the surface; the loop derives once from the result — no double-derive,
and a listener structurally cannot act on not-yet-derived messages.
- Tighten compactIfNeeded to required (session, system, model, signal).
- Enforce a single-pass convergence invariant in resolveConfig: reject configs
where summarizationMaxTokens + retainTokens exceeds the threshold, so a
compaction can never immediately re-trigger.
- Document the crash vs recoverable failure taxonomy; core session repair stays
compaction-agnostic (a log-only orphaned compact/start is inert).
- Wire dsh-compact-basic into examples/coding-agent and add a with-key
compaction e2e (compaction's first real-world exercise + runaway net).
- Rewrite the RFC to encode the blueprint and move it to implemented/.
The runaway-turn snapshot is a named deferred follow-up: dsh-llm-replay cannot
yet serve the interleaved summarization model call.
