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Compatibility

| Surface | Status | |---|---| | Harness | DeepSeek Harness 0.1.5-rc.1 (tag dsh-v0.1.5-rc.1 = 183f08e9c6dd; leg A→B handoff dsh-v0.1.5-alpha.1 = 5dda764ed3aa; corridor start 0.1.3-alpha.1). Peer band @deepseek-ai/dsh-skill >=0.1.2-rc.1 <0.2.0 \|\| >=0.1.5-alpha.1 <0.2.0, @deepseek-ai/cordis ^4.0.2, @deepseek-ai/schemastery ^3.18.2. | | Node | ^22.19.0 \|\| >=24.0.0 | | Platforms | Anywhere Node runs; the scanner is filesystem-only and platform-neutral | | Model | Text-only models fully supported; the skill is a Markdown body, no tool or vision requirement | | Scope | Two closed legs, one span: leg A 0.1.3-alpha.1 → 0.1.5-alpha.1 plus leg B 0.1.5-alpha.1 → 0.1.5-rc.1. A corridor never widens: a hop after 0.1.5-rc.1 is a new package. | | Legs | Both legs live in this package: leg A keeps the S1–S10 + M1 seams, leg B keeps C1, C2, C4, C5, H1–H4, P1 — each with its own evidence, card section, fixtures and rollback path. There is no sibling package to install. | | C3 | Retired: leg B's card spelled the stale-type-line false green C3, which is the same defect as leg A's M1. The fold is recorded on the card; --seams C3 matches nothing. | | Sibling | Do not mount the retired dsh-plugin-upgrade in the same profile: both register the agent skill plugin-upgrade-015, so the second mount collides on the skill name. That package is deprecated on npm and its repository is retired; this package replaces both of its legs. |

What you get

Two halves, one seam catalog:

• A bundled agent skill (plugin-upgrade-015) — the merged corridor card and a fix-and-verify loop. The body first routes the caller to the leg that matches its peer band; the model loads it only when a task actually needs it, and the package contributes no system-prompt paragraph and no tool.
• A zero-dependency CLI (dsh-plugin-upgrade-015-scan) — reports file:line facts for the merged twenty seams (S3, S8, S9, M1, S4, S5, S6, S7, S2, S1, S10, C1, C2, P1, C4, C5, H1, H2, H4, H3) re-read from the harness tag ranges on 2026-09-09 (leg A) and 2026-09-10 (leg B). Exit 1 on any error-severity hit, so it drops straight into CI.

The point is the failure mode this corridor exists to kill: this span's breakage is mostly silent, from both ends. The type line can be stale, so the repo compiles against the old catalog (seam M1), and the bare conversation client slot was deleted with no alias while ctx.slots.inject() only runs its callback when the declaration exists — so a client half that still targets it stops mounting with no error, no log line and no failed build (seam C1). Three classes of breakage survive typecheck + test:

1. the local gate compiles a stale type line — old paths alias, or dev/test types pinned at 0.1.5-alpha.* (seam M1);
2. a log writer omits the V3 required stream field, so the session imports and then refuses to resume (seam S3);
3. the tests are mocked against the old shape, so they pass while the host drops the contribution (seam C1).

Honest sizing: leg B's workspace sweep found that the family's client halves use only 8 slot keys, all of which survive in rc.1 — for them the rc.1 breakage is latent, not actual. Third-party client plugins that targeted the bare conversation key are the ones that break, and they break quietly. Leg A's sweep found the opposite texture: 40 repos, 11 of them hit M1, and fixing the stale path exposed real TypeScript errors in 3 repos that were previously "green".

Quick start

# 1. install the bundle into your profile
dsh plugin --profile web add dsh-plugin-upgrade-015

# 2. verify the row mounted
dsh --profile web --dump-config | grep -A3 'id: dsh-plugin-upgrade-015'

# 3. scan the plugin you are upgrading
npx dsh-plugin-upgrade-015-scan --repo ../my-plugin

Then ask the agent to use the plugin-upgrade-015 skill, or drive the loop yourself with the card at skills/plugin-upgrade-015/references/v0.1.3-alpha.1-to-v0.1.5-rc.1.md (leg A is §1, leg B is §2, the merged seam index is §3).

Install & uninstall

dsh plugin --profile web add dsh-plugin-upgrade-015            # from npm
dsh plugin --profile web add "github:PerryLink/dsh-plugin-upgrade-015#main"   # from source
dsh plugin --profile web remove dsh-plugin-upgrade-015         # uninstall (reversible)

Installing the bundle only registers a skill; removing the row removes the skill. The CLI is a normal npx target and needs no profile at all.

Configuration

Every key is optional and lives in the profile patch:

| Key | Default | Meaning | |---|---|---| | enabled | true | Register the packaged skill. Set false to keep the dependency mounted but silent. | | skillName | plugin-upgrade-015 | Directory under skillsRoot to register, and the name shown in the catalog. | | skillsRoot | the package's own ./skills | Where <skillName>/SKILL.md lives. Point it at your own card to reuse the plumbing. | | userInvocable | true | Whether a human can invoke the skill by name in addition to the model. |

- insert:
    - id: dsh-plugin-upgrade-015
      name: dsh-plugin-upgrade-015
      config:
        skillName: plugin-upgrade-015

The plugin mounts loud: a missing SKILL.md, an empty body, or a frontmatter without name fails the mount instead of registering an empty skill.

Surfaces

Skill — plugin-upgrade-015 (model- and user-invocable by default). Body: leg routing table, the 8 hard rules and the 6-step loop. References: the merged corridor card. Scripts: the detector, shipped inside the skill directory so relative paths resolve.

CLI — dsh-plugin-upgrade-015-scan:

dsh-plugin-upgrade-015-scan [--repo <path>] [--json <out.json>] [--seams S3,C1,P1] [--quiet]

| Flag | Meaning | |---|---| | --repo <path> | Repository to scan (default: cwd). | | --json <out.json> | Also write the machine-readable report (repo, scannedAt, files, hits[], bySeam). | | --seams S3,C1,P1 | Restrict to specific seams of the merged catalog. | | --quiet | Suppress the human rendering (pair with --json). |

Exit codes: 0 no error-severity hit · 1 at least one error-severity hit · 2 usage or scan failure. A clean scan is necessary but not sufficient — the exit criterion is a real-host smoke, plus a resume round-trip for log writers (leg A) and a real browser assertion for the client half (leg B).

The twenty seams

Order follows the catalog in lib/scan.mjs (leg A first, then leg B), which is also the order test/card.test.mjs pins the card to.

| Id | Severity | What changed on the way to 0.1.5-rc.1 | |---|---|---| | S3 | error | assistant/message gained a required stream field (session format V3): a log written without it imports successfully and then refuses to resume (Session.fromRestore throws invalid settlement fields). | | S8 | error | SessionHandle.read() returns SessionHandleReadResult ({ eventState, events }) instead of the event array; array operations must unwrap .events. | | S9 | error | SystemPrompt's config renamed persona → personaPrefix / personaSuffix. Substituting includeHarnessIdentity: false is not equivalent — it deletes the harness identity block. | | M1 | error | The local gate compiles a stale type line: dev/test types pinned at 0.1.5-alpha.*, or a tsconfig paths alias resolving to a missing checkout directory, makes TypeScript fall back silently to the published types. Green gate, wrong ruler. | | S4 | error | tool/code-dispatch was renamed tool/ptc-dispatch; the old label is no longer recognized in V3 sessions. | | S5 | error | ctx.agent was removed: the caller must pass the Agent explicitly (e.g. the second parameter of setup(agentCtx, agent)). | | S6 | error | Inbox is a type interface, not a constructable class; fixtures use the official unsupported shape and runtime code reads agent.inbox. | | S7 | warn | SubprocessHandle.pid was removed (only SubprocessTerminalHandle.pid remains); drop the field from test fixtures. | | S2 | warn | EpochHeader.system was removed: the system prompt is surface node 0's system/message now. | | S1 | warn | Session format V3 and generation-suffixed log names — the current generation is session.v3.jsonl.zstd, so scripts that hardcode session.jsonl.zstd fail silently. | | S10 | warn | Plugin-authored session events must go through the host's fail-closed adaptation gate: Session.append has no ignorable write channel, so an unconditional append can make a session unreadable. | | C1 | error | The bare client slot conversation was deleted and replaced by main + main.conversation, with no alias. ctx.slots.inject() only fires when the declaration exists, so a plugin targeting it stops mounting silently. | | C2 | error | @deepseek-ai/dsh-client-ui-sidebar-textpreview was renamed …-sidebar-documentpreview; the old name is gone with no shim package. | | P1 | error | The peer band must keep its second segment: >=0.1.2-rc.1 <0.2.0 alone rejects 0.1.5-rc.1 under npm semver's prerelease-tuple rule (measured false on semver 7.8.5). | | C4 | warn | rc.1 added a global main-panel model (main, sidebar.panellist, ctx.layout.selectPanel(MainPanelId \| null)) and appended a usePanelInfo standard prop to almost every slot. | | C5 | warn | Document preview moved to the keyed slot sidebar.right.tab.document (DocumentContent); sidebar.right.pane.tab survives but its parent entry became rightbar.session. | | H1 | warn | KNOWN_SESSION_EVENT_TYPES gained deliverables/presented and subagent/catalog — the fail-closed vocabulary grew. | | H2 | warn | The new present tool's row occupies tool.call.toolview key 'present', which was free in alpha.1. | | H4 | info | The DeepSeek adapter's default advisory catalog now leads with deepseek-flash (DeepSeek-V41-Flash). | | H3 | info | New optional capabilities: ctx.sessionFeedback, ctx.layout.beginNavigation(), ctx.workspaces.openSession() / openWorkspace() / forkSession(). Listed on the card; deliberately not auto-detected. |

S7, S2, S1, S10, C4, C5, H1, H2 and H4 are deliberately advisory: they have legitimate matches (a repo that already uses the new API, a documentation snapshot, a plugin's own model-id table, a Node ChildProcess.pid), so the scanner reports them as leads for manual review rather than failures. M1 and P1 are structured checks — they resolve package.json and tsconfig*.json instead of matching text — and H3 is card-only: documented, id-parity checked, and deliberately without a detector (CARD_ONLY = ['H3']).

What this does not cover

• A hop after 0.1.5-rc.1. The merged span ends at rc.1 by construction: the harness hop 0.1.5-rc.1 → 0.1.5-rc.2 added no plugin-facing seam (this package's own dev/test pin and CI probe run on the 0.1.5-rc.2 line so the catalog is verified against the newest published types). Anything that adds a seam later is a new package — a card that drifts is worse than no card.
• The 0.1.1 → 0.1.2 hop. Use the community convergence skill.
• Restating across legs. Leg A owns the session-format seams (assistant/message.stream, SessionHandleReadResult, EpochHeader.system, ctx.agent, Inbox, SystemPrompt.persona, the V3 log generation) and leg B does not restate them — the whole packages/core/session/src diff in leg B's range is two added event-type literals and one comment line. Each leg's card section keeps its own scope statement.
• The DSH user-facing upgrade path. This package upgrades plugin source code, not a user's harness installation.
• Theme tokens. docs/web-styling.md has zero changes in leg B's range.
• Proof. A clean scan is a hypothesis. The exit criterion is a real-host smoke (temp DSH_HOME, target CLI, plugin add <tarball>, --dump-config) plus a resume round-trip for session-log writers (leg A) and a real browser assertion for every client-side hit (leg B).

Security boundaries

• Read-only scan. The CLI never writes inside the scanned repository; --json writes only to the path you pass.
• No network, no shell. The scanner imports nothing beyond Node's standard library and never spawns a process.
• No secrets. Nothing in the package reads credentials, environment tokens, or session data.
• Sandboxed smoke recipe. The card's real-host check uses a mkdtemp DSH_HOME; it never touches your real ~/.dsh.

Development

npm install                        # or: pnpm install (the repo ships a pnpm-lock.yaml)
npm test                           # node --test: scanner, card<->catalog parity, real Cordis + SkillRegistry
npm run verify:self-contained      # every import resolves inside the package
npm run verify:artifacts           # the packed tarball carries the skill, CLI and patch, and excludes tests
npm run check:readmes              # five-language README consistency
npm pack

The scanner has a synthetic fixture pair per leg: fixtures/leg-a-bad-repo (leg A's session/config seams, every error seam present on purpose) with fixtures/leg-a-good-repo (adapted), and fixtures/bad-repo (leg B's client-slot seams) with fixtures/good-repo (adapted) — plus a live negative on a family repository already pinned to 0.1.5-rc.1, so a regression in the catalog fails the suite rather than a downstream user. test/card.test.mjs asserts that the merged card index and lib/scan.mjs name exactly the same twenty seam ids with the same severities, and that CARD_ONLY is exactly ['H3'] — the evidence-binding rule as a machine gate.

Topics

dsh, dsh-plugin, deepseek-harness, deepseek, cordis, plugin-upgrade, migration, skill, version-card, scanner, client-slots (mirror package.json keywords; dsh-plugin is the ecosystem's visibility channel).

PerryLink DSH Plugin Family

This project is one of the 40 DeepSeek Harness plugins maintained by PerryLink. If this one helps you, the others likely will too:

| Plugin | One-liner | |---|---| | dsh-auto-review | Second-model auto-review on the approval chain, fail-closed by default | | | dsh-autotier | Automatic strong/cheap model-tier routing with deterministic risk guards and a /tier command | | | dsh-background-agents | Durable background child agents with a Web UI sidebar, messaging and interrupt | | | dsh-budget | Cost governance for DeepSeek Harness: budgets, carbon, and latency in one panel. | | | dsh-catalog | DSH Desktop Market standard catalog source for the PerryLink family | | | dsh-cert-mcp | Read-only MCP server exposing the certification registry: grades, snapshots and five-dimension evidence | | | dsh-checkpoint-rewind | Unified session + workspace + config checkpoints with one-shot /rewind | | | dsh-claude-move | Migrate Claude Code, Codex, OpenCode and Hermes sessions, memories and skills into DSH | | | dsh-click | Cross-platform native desktop control for DeepSeek Harness — Windows first. | | | dsh-composer-history | Terminal-style input history for the web composer: arrows, Ctrl+R search | | | dsh-data-quality | Deterministic dataset profiling, cleaning and citation verification | | | dsh-defend | Prompt-injection, jailbreak, and secret-leak defense for DeepSeek Harness. | | | dsh-doublecheck | Engineering-discipline guard: requirements grill, test gates, adversary review | | | dsh-draw | Unified static-image generation routing for DeepSeek Harness. | | | dsh-fast | Read-only performance diagnostics: load, spill, compaction and cache hit rate | | | dsh-fund-research | Chinese mutual-fund research with sealed, traceable source snapshots | | | dsh-github | GitHub PR/issue/CI integration with every write approval-gated | | | dsh-industry-research | Industry and company research pack: chain map, policy timeline, company cards | | | dsh-kit | One-command starter pack that installs the core family | | | dsh-library | Local document knowledge base with hybrid search and citation-aware injection | | | dsh-local-ai | Local Ollama model discovery and task-based routing with cloud fallback | | | dsh-lsp-actions | LSP diagnostics, formatting, completion, code actions, symbols and rename | | | dsh-mask | PII masking at the model boundary with a host-side restore table | | | dsh-mcp-panel | MCP management console: /mcp command, Settings tab and trial calls | | | dsh-memento | Approval-gated cross-session memory protocol (ctx.memory + SQLite) | | | dsh-observe | OpenTelemetry and Langfuse telemetry export from the session event stream | | | dsh-output-styles | Runtime-switchable model output styles | | | dsh-permission-rules | Declarative allow/deny/ask rules plus a process-level network policy | | | dsh-plugin-certification | Community certification registry with repro-checkable grades and badges | | | dsh-plugin-doctor | Zero-dependency static + sandbox smoke detector for DSH plugins | | | dsh-plugin-guide | Plugin-dev knowledge base, agent skill and the dsh-plugin-dev CLI toolchain | | | dsh-plugin-kit | Shared zero-runtime-dependency toolkit for the PerryLink DSH plugins | | | dsh-plugin-portal | Zero-dependency static portal rendering the whole plugin family as one page | | | dsh-reach | Multi-channel approval/question bridge: WeChat, Telegram, Feishu + a session console | | | dsh-research-report | Verifiable research reports: evidence ledger, manifest seal, per-claim verdicts | | | dsh-score | Multi-dimensional plugin quality scoring with an evidence-backed leaderboard | | | dsh-session-pin | Pin sessions and workspaces in the Web sidebar with per-pin colors | | | dsh-session-sync | Git-backed cross-device session synchronization with keep-both merges | | | dsh-skill-pack-security | Security-audit skill pack plus the plugin_vet supply-chain gate | | | dsh-talk | Voice-first session loop: speech-to-text input and text-to-speech replies | | | dsh-team-rooms | Cross-session team rooms: shared message bus, task board and timeline | | | dsh-test-drive | Isolated install-and-smoke test drives with a pass/fail matrix | | | dsh-ticktick | TickTick/Dida365 task bridge: session-header panel plus eleven agent tools | | | dsh-translate | Vendor parameter translation and deterministic JSON repair | | | dsh-wechat | WeChat ↔ DSH bridge (Tencent iLink bot) developed with pan17, who hosts the repo | | | dsh-personal-directive | Personal directive injector with a top-bar toggle (fork of liucai2026/dsh-personal-directive) | |

Part of the PerryLink DSH plugin family — 40+ repositories covering sessions, memory, permissions, delivery, observability and developer tooling. Browse the catalog at perrylink-dsh-catalog.perrylink.workers.dev or the dsh-plugin topic.

License

Apache-2.0 — see LICENSE. Install-time dependencies and their licenses are listed in THIRD_PARTY_NOTICES.md; nothing is bundled.