deepseek-harness/.agents/notes/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md

Agent Note: Prune dead public and result surface

Status: proposed

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Problem

Several package-root exports, result fields, and convenience methods have no production consumer. They survive because tests import internals through public entry points or because a type anticipated a caller that never arrived. Each item is small in isolation, but together they enlarge the SDK contract, generated catalogs, documentation, and regression matrix without enabling a shipped path.

The production corpus is packages/*/*/src, example sources/config, and runtime scripts. Tests, package READMEs, and Agent Note prose are evidence of publication but not fixed callers. cordis_inspect makes packages/cordis/tool-cordis/src/api-catalog.ts model-visible, and cordis_mount can invoke injected services through guarded real-service proxies, so catalogued service methods and returned shapes are a genuine dynamic product surface. The table therefore distinguishes absence of a fixed repository caller from unreachability: rows touching catalogued vocabulary intentionally contract what model-written mounts can discover and call, while package-root implementation helpers are not reached through that service façade. Exact-symbol searches produce the following inventory:

Surface	Production evidence	Simplification
SurfaceManager.invalidate()	Only its unit test calls it; seeding completes before the lazily-created manager exists and the session never replaces its log reference.	Delete it and its impossible wholesale-replacement contract.
ToolExecutionResult.callId	Every hook already receives the immutable ToolExecution; the loop and ACP correlate through the call/session event. No consumer reads the duplicate result field.	Remove the field, copy/mismatch guards, and tests that prove the duplicate cannot disagree.
ReactLoopAgent root export	Outside-package named imports are tests; production programs against Agent and creates/resumes through ctx.agents.	Return/interface-type Agent and make the concrete loop class package-internal; keep the deliberate synchronous config-only AgentLoop.create() path.
workflow-workerthread protocol/runtime/session re-exports and named WorkerWorkflowEngine	Every package-name consumer uses the default engine; the workflow Agent Note already defines the worker wire protocol as private.	Keep the default plugin class/config contract; drop the duplicate named class export and keep protocol modules source-private.
code-runtime-worker protocol/bootstrap re-exports	Outside-package production/e2e consumers use WorkerCodeRuntime and config, not BootstrapPort, PatchableStream, or worker message/boot types.	Keep the runtime class/config contract and make its wire/bootstrap vocabulary source-private.
ACP translation/presenter root exports	agentOptions, streamSessionEventUpdate, todosToPlan, ToolPresenter, nullToolPresenter, and TerminalRendering have only same-file or ACP-test consumers; the sole outside-package production consumer mounts the plugin namespace.	Keep name, inject, Config, AcpConfig, and apply; make translation/presentation helpers source-private and test them in-package.
providerWording and completedTurnPrefix root exports	Each has one same-package production caller; only the balanced-prefix helper has a same-package white-box test.	Make them source-private and test provider behavior.
depthOf, SubagentDepthError, SENSITIVE_ENV_PATTERN, waitForExit, and exitsWithin root exports	Production subagent backends consume the in-process runner and subprocess construction/disposal helpers, not these enforcement/test internals.	Keep depth/environment/exit behavior but make the helpers and error/regex source-private; test through spawn and disposal.
PersistenceCoordinator.inits, backend inits accessors, seedCoversPrefix, and assertSerializable	The accessors exist for white-box tests; seedCoversPrefix has no outside production importer; assertSerializable has no production caller and duplicates the coordinator append boundary's lossless snapshot.	Observe initialization through session/flush, make seedCoversPrefix source-private, and delete assertSerializable. Keep both backends, SessionHeader, and SQLite's version contract.
LlmError.status and replay status	Adapters/replay populate it, but production branches on stable error code/message and never reads raw status.	Remove the unread field and replay plumbing while preserving error classification.
BlockAssembler.push() return value	Both production callers ignore the returned completed block.	Return void; keep the deliberately public blocks()/message() contract.
compactRegion's separate session argument	The fixed caller passes the same object already present as agent.session; the model-visible mount API can also call the method, but accepting two identities permits a mounted plugin to provide an incoherent pair.	Keep the manual-region seam while deliberately narrowing it to agent.session as the one source of truth.
CompactionResult.startSeq, summarySeq, endSeq, and summary	The production consumer reads only shadowed range/seq/token accounting; the durable log owns summary and event identity.	Remove the four result echoes while keeping both shared transcript renderers.
BasicCompactService estimation/summarization visibility	No outside production caller invokes the five methods; the implemented Agent Note names only estimateContentTokens() and summarize() as subclass hooks.	Make those two protected and the three orchestration-only estimators private.
CodeLogEntry.source/level and RunCodeMeta.dispatches	Every production consumer maps logs to text; no presenter/model path reads the other fields or the persisted dispatch count.	Make code-runtime logs strings (or text-only entries) and remove result-meta dispatch plumbing; keep the local counter that mints deterministic dispatch ids.
CodeRuntime.language and CodeRuntime.isolation	The worker backend supplies the only production values, while Code Mode and every other production caller invoke only run().	Remove the unread descriptors while preserving the worker's language, isolation, budgets, cancellation, and disposal behavior.
ToolNotFoundError.toolName, SystemPrompt.config, and BashTask.command	Each stored public value has no production reader.	Drop the unread field while retaining error messages, resolved configuration behavior, and task lifecycle.
Backend package-root implementation helpers	The exact inventory below is called only through relative same-package imports. Production namespace imports mount the retained plugin contract without reading these properties; named root consumers are tests.	Retain each adapter/provider/service and its config/error contract; stop exporting the listed helper functions/constants at package roots.
Consumer package-root implementation helpers	The exact inventory below has only same-package production callers. Production namespace imports mount plugin contracts without reading helper properties; named root consumers are tests.	Retain plugin contracts and stable error codes; move tests to package-local modules or public behavior and stop exporting the listed helpers at package roots.

Grouped helper-export inventory

• dsh-llm-deepseek: httpErrorCode, serializeMessages, serializeRequest, DONE, parseSse, mapFinishReason, mapUsage, and translate; dsh-llm-pi-ai: buildModel, mapStopReason, mapUsage, toPiContext, and toStreamChunks.
• dsh-bash-local: DEFAULT_GRACE_MS, ENV_OVERRIDES, killGroup, OutputCollector, and runBash; dsh-bash-sandbox: shellQuote, classifyDenial, and classifyRunnerFailure; dsh-sandbox-local: bwrapProfileArgs, landlockProfileArgs, and seatbeltProfileArgs. The public mutable test-injection fields and their types are outside this proposal.
• dsh-fs-local: applyLiteralEdit, listDirectory, probe, readForEdit, readTextForDiff, readWholeText, resolveLocalTarget, restoreLineEndings, streamWholeText, and writeFileAtomic.
• dsh-web-fetch-local: classifyContentType, decoderForCharset, isSameOrigin, parseCharset, and validateFetchUrl; dsh-web-search-exa: mapExaResponse and mapExaResult; dsh-web-search-deepseek: citationSnippets and mapAnthropicResponse; dsh-web-search-perplexity: mapPerplexityResponse and mapPerplexityResult.
• dsh-tool-fs: READ_LIMIT, STREAM_MIN_SIZE, READ_MAX_BYTES, READ_MAX_LINE_LENGTH, DIFF_CONTEXT, applyReadTool, parseReadArgs, applyWriteTool, formatWriteOutput, parseWriteArgs, applyEditTool, formatEditOutput, parseEditArgs, buildWindow, formatReadOutput, computeHunkDiffs, and diffsFromMeta.
• dsh-tool-web: WEB_SEARCH_MAX_RESULTS, applyWebSearchTool, formatSearchOutput, parseSearchArgs, presentSearchCall, applyWebFetchTool, formatFetchOutput, parseFetchArgs, presentFetchCall, renderBody, and htmlToMarkdown; dsh-timeout-policy: toolTimeoutResult; dsh-compact-basic: resolveConfig; dsh-tool-bash: renderResult.

Proposal

Remove or demote every row as one bounded coordinated public-surface cleanup. Update package READMEs, JSDoc, generated API/event catalogs, type-equivalence records, exports maps where needed, and tests so they exercise the owning public seam instead of preserving test-only entry points. Do not collapse any capability seam, LLM adapter, persistence backend, or lifecycle quiescence contract.

Alternatives considered

Keep test conveniences and self-contained results public. Public helpers can make white-box tests convenient, self-contained result fields can look ergonomic, and future embedders might want the concrete loop or enumeration methods. Those benefits are hypothetical; today they make every implementation and document explain states that no shipped caller can observe. A real consumer can introduce the smallest contract it needs, with its ownership and failure semantics known.

Keep every catalogued member for model-written mounts. The self-referential toolset is a real generic consumer route, not generated-doc noise. Its value comes from an accurate, composable service surface, however, not from preserving duplicate fields or incoherent argument pairs indefinitely; each catalogued contraction above removes a fact available elsewhere on the same execution, agent, or result and updates the API reference in the same change.

Acceptance criteria

• Exact-symbol searches show no removed surface outside this Agent Note and any implemented-Agent Note amendments.
• Every surface listed in this Agent Note is absent or demoted as specified; deliberately retained extension/test contracts outside the inventory are unchanged.
• Tool execution, compaction, both LLM adapters, both persistence backends, workflow isolation, and agent creation/resume retain their shipped behavior.
• Typecheck, coverage, snapshots, doc-sync, module-graph verification, build, and hygiene pass.

Risks

Most removals are compile-visible but runtime-neutral. The compaction argument cleanup deliberately forbids a session/context mismatch while retaining the manual-region seam. External pre-release embedders and existing model-written mounts may import fewer helpers, pass fewer arguments, or receive narrower result shapes; this is an intentional product-surface contraction, not merely generated-catalog cleanup. The repository is unreleased, so carrying unsupported surface is the larger foundation cost.