Evidence packet — run AGS-2026-08-21-SEQTHINK

Canonical location for logical records 1–5 of the emitted result (identity; boundary/revision/tier; source register; shared records; runtime account). Frozen at step 2/4 of analyse-agentic-system. Lens workers consume this packet and the frozen read-only boundary; they must not reacquire, refresh, or widen sources.

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Record 1 — Run / staging identity

field	value
run/result ID	AGS-2026-08-21-SEQTHINK
system identifier	sequentialthinking MCP server (@modelcontextprotocol/server-sequential-thinking), subtree src/sequentialthinking of github.com/modelcontextprotocol/servers
staging identity	kb/work/analyse-agentic-system/trials/sequentialthinking-rerun/
publication target	none authorized for this run — logical result retained under the staging identity (see record 11)
analysis cutoff	2026-08-21, against frozen revision 2ecb382a02d7921511180dfbadcef24eb66a052f

Record 2 — System boundary, revision, and overall evidence tier

In-scope determination

The subject is an MCP server: a component whose deployed behavior depends on model calls it serves but never issues. Step 1.2's second route (narrower system, model call may live outside its own boundary, "such as an MCP server or tool") admits it. In scope.

Boundary kind: complete artifact, partial loop

src/sequentialthinking is a complete, independently distributed artifact (npm package with its own package.json, bin, and build). But the loop its doctrine advertises — iterative, revisable, branching problem-solving — is produced jointly by the artifact, an MCP host client, and a model, only one of which is inside the boundary. Conclusions may be whole-artifact; they may not describe the behavior the crossing loop produces.

Inclusions (by function)

Components whose scheduling, context selection, retained state, action execution, checking, acceptance, or authority decisions produce or constrain the behavior under review, and that ship inside the artifact:

• the request-handler registrations and their dispatch predicate (index.ts:251–267);
• the tool specification and its natural-language instruction text (index.ts:133–235), which is the artifact's only influence on the reasoning loop;
• the per-call validation, coercion, retention, formatting, and return logic (index.ts:25–131);
• process-local retained state (thoughtHistory, branches, index.ts:26–27);
• the stderr render path (index.ts:58–84, 104, 272);
• packaging and distribution contract (package.json, tsconfig.json);
• shipped doctrine (src/sequentialthinking/README.md; root README.md:27).

Exclusions (external participants), each with the conclusion it prevents

ID	External participant	Evidence status	Conclusion it prevents
EXT-1	@modelcontextprotocol/sdk 0.5.0 — Server, StdioServerTransport, request schemas. Pinned at package-lock.json:808–817; no node_modules present in the checkout, so its source was not inspected.	uninspected	Any claim about how JSON-RPC framing, method routing, protocol error handling, cancellation, or connection lifecycle actually behave. The artifact's dispatch loop is described only at the registration surface it exposes.
EXT-2	MCP host client (README's worked example is Claude Desktop, README.md:43–59). Owns process launch, tool-list injection, the decision to call the tool, and the conversation transcript.	uninspected	Any claim about whether or how the tool description reaches a model, how often it is called, or what the caller does with the returned status object.
EXT-3	The model that issues the tool calls and authors every thought string.	uninspected	Any claim that the advertised reasoning discipline (revision, branching, hypothesis generation and verification) actually occurs; any claim about the quality or effect of the loop.
EXT-4	Sibling servers in the same monorepo (src/* workspaces).	out of boundary by declaration	Nothing relevant — no code path in the subtree references them.

Revision

2ecb382a02d7921511180dfbadcef24eb66a052f (committed 2024-12-06), clean working tree, at /home/zby/llm/servers. This is a stable but old boundary: roughly 20 months before the analysis cutoff. Published limitation — every conclusion is pinned to this revision and says nothing about the current upstream state.

Overall evidence tier: code-grounded

Every material loop the boundary includes rests on inspected TypeScript source (index.ts, read in full). EXT-1's dispatch machinery is a declared external dependency, which per the tier rule neither raises nor lowers the tier; it is carried as the limitation named above. No observed run and no causal experiment exist anywhere in the register, which bounds conclusion statuses at implemented for everything the artifact does.

Record 3 — Source register

ID	Kind	Identity / location	Revision / capture	Evidence layer	Inspected scope	Citation anchors	Access gaps
SRC-1	existing checkout, file	/home/zby/llm/servers/src/sequentialthinking/index.ts	2ecb382a, clean	implementation	whole file, 279 lines, read in full	SRC-1:<line>	none
SRC-2	existing checkout, file	/home/zby/llm/servers/src/sequentialthinking/README.md	2ecb382a	doctrine/design	whole file, 63 lines	SRC-2:<line>	none
SRC-3	existing checkout, file	/home/zby/llm/servers/src/sequentialthinking/package.json	2ecb382a	implementation (packaging/distribution contract); the description field is doctrine/design	whole file	SRC-3:<line>	built dist/ not present
SRC-4	existing checkout, file	/home/zby/llm/servers/src/sequentialthinking/tsconfig.json	2ecb382a	implementation (build config)	whole file	SRC-4:<line>	none
SRC-5	existing checkout, files	/home/zby/llm/servers/package.json, /home/zby/llm/servers/tsconfig.json, /home/zby/llm/servers/package-lock.json	2ecb382a	implementation (workspace + dependency pinning)	root manifests read; lockfile inspected only at the @modelcontextprotocol/sdk entry	SRC-5:package-lock.json:808–817	lockfile not read in full
SRC-6	existing checkout, file	/home/zby/llm/servers/README.md	2ecb382a	doctrine/design	lines 25–29 (the one-line catalogue entry for this server at :27, plus adjacent entries for other servers)	SRC-6:27	rest of file not material to boundary

Register-wide access gaps, each with the conclusion prevented:

• No node_modules, no dist/ → SDK behavior and the built artifact are uninspected; prevents any claim about runtime protocol behavior or about what the published package actually contains beyond the declared files: ["dist"] (SRC-3:13–15).
• No tests, no fixtures, no logs, no run traces anywhere in the subtree → prevents any observed or causally supported status for any finding in this run.
• No published-npm-tarball inspection, no host configuration inspected → prevents claims about deployed configuration in the field.

Targeted reads added centrally after the freeze. All read-only, all inside the frozen boundary; nothing was fetched, refreshed, or mutated.

Read	Source	Effect on the register	Downstream invalidation
Memory lens: index.ts full, src/sequentialthinking/README.md full, package.json full	SRC-1, SRC-2, SRC-3	none — all already registered at whole-file scope	none
Epistemic lens: same three files, full	SRC-1, SRC-2, SRC-3	none — confirmatory re-reads at registered scope	none
Epistemic lens: root README.md:25–29	SRC-6	inspected scope widened from line 27 to lines 25–29; row updated above	none — lines 25–26 and 28–29 are catalogue entries for unrelated servers, and no finding in the run uses them
Orchestrator verification: index.ts:148–157, :177–188, :192–195	SRC-1	none — already registered at whole-file scope	none

No targeted read invalidated a downstream finding, so no lens work was redone on this account.

Record 4 — Shared component, object, route, claim, absence, and authority records

Ownership per the instruction's canonical-records table. Amendments are listed under the record they attach to.

Components (CMP-*)

ID	Component	Form / substrate	Evidence
CMP-1	SequentialThinkingServer class — the stateful thought recorder	TypeScript class, process-local instance	SRC-1:25–131, instantiated SRC-1:249
CMP-2	SEQUENTIAL_THINKING_TOOL — tool spec: name, ~54-line natural-language description, JSON Schema	symbolic (JSON Schema) + natural-language (description)	SRC-1:133–235
CMP-3	MCP Server instance and its two handler registrations	TypeScript, delegating to EXT-1	SRC-1:237–267
CMP-4	StdioServerTransport binding and runServer entrypoint	TypeScript, delegating to EXT-1	SRC-1:269–278
CMP-5	formatThought stderr renderer (chalk-coloured box drawing)	TypeScript + ANSI text	SRC-1:58–84, invoked SRC-1:104
CMP-6	packaging/distribution contract: bin name, files: ["dist"], build scripts, pinned deps	npm manifest + tsconfig	SRC-3, SRC-4, SRC-5
CMP-7	shipped doctrine: feature list, tool description, usage guidance, host config example	Markdown	SRC-2, SRC-6:27

Amendment CMP-2/a1 (doctrine–implementation name mismatch). SRC-2:16 documents the tool as sequential_thinking; the implementation registers and dispatches on sequentialthinking (SRC-1:134, SRC-1:256), and the package name is server-sequential-thinking (SRC-3:2). A host wiring itself from the README's tool name would not match the dispatch predicate. Evidence anchor: SRC-1:134,256 vs SRC-2:16. Superseded value: none — the record is amended, not replaced.

Amendment CMP-3/a1 (version disagreement). The MCP server identity advertised over the protocol declares version: "0.2.0" (SRC-1:240); the package it ships in declares 0.6.2 (SRC-3:3). A client reading server capabilities is told a different version than the registry. Evidence anchor: SRC-1:237–241 vs SRC-3:3.

Amendment CMP-6/a1 (declared, unused dependency). yargs and @types/yargs are declared dependencies (SRC-3:24,28) but no source file in the boundary imports them (search boundary: all four subtree files, full-text). No argument parsing exists; the binary takes no options.

Operative objects (OBJ-*)

ID	Object	Form	Producer	Consumer	Persistence
OBJ-1	ThoughtData record — one validated thought plus its control flags	in-memory object (SRC-1:13–23, built SRC-1:45–55)	EXT-3 authors thought; CMP-1 validates and shapes	OBJ-2, OBJ-3, CMP-5	process lifetime
OBJ-2	thoughtHistory — append-only array of every accepted OBJ-1	in-memory array (SRC-1:26, written SRC-1:94)	CMP-1	read only for .length (SRC-1:114)	process lifetime
OBJ-3	branches — map from caller-authored branchId to array of OBJ-1	in-memory record (SRC-1:27, written SRC-1:96–101)	CMP-1	read for content by nothing; read on the write side at SRC-1:97,100 for bucket existence and resolution; read for derivation at SRC-1:113 (Object.keys)	process lifetime
OBJ-4	tool result status object — {thoughtNumber, totalThoughts, nextThoughtNeeded, branches[], thoughtHistoryLength}	JSON string in an MCP text content block (SRC-1:106–117)	CMP-1	EXT-2 → EXT-3	single response
OBJ-5	tool description text, 54 lines (SRC-1:135–188) — container record; corrected by OBJ-5/c1 and split into OBJ-11 (assertive) and OBJ-12 (directive). It is not uniformly second-person instruction: :135–146 is third-person description, :148–157 is a "Key features" list that switches grammatical subject mid-list (items 1–5 grant capability in the second person, items 6–9 drop the subject and assert what the tool does), :159–175 is parameter documentation, and only :177–188 is the numbered second-person block.	natural-language, static shipped material	authors of CMP-2	EXT-3, via EXT-2's tool list	shipped, immutable at runtime
OBJ-6	rendered thought box on stderr	ANSI-coloured text (SRC-1:78–83, emitted SRC-1:104)	CMP-5	no in-boundary consumer; whatever captures the process's stderr	not retained by the artifact
OBJ-7	tool inputSchema — JSON Schema, 9 properties, 4 required	symbolic (SRC-1:189–234)	authors of CMP-2	EXT-2 (client-side arg shaping), and mirrored by RTE-3 server-side	shipped
OBJ-8	error result object — {error, status:'failed'} with isError: true	JSON in MCP content block (SRC-1:118–129)	CMP-1 catch block	EXT-2 → EXT-3	single response

Routes (RTE-*)

ID	Route	Endpoints	Progression	Evidence
RTE-1	tool discovery — ListTools returns CMP-2 verbatim	EXT-2 → CMP-3 → EXT-2	pull, once per client tool-list refresh (timing owned by EXT-2)	SRC-1:251–253
RTE-2	tool invocation dispatch — name equality check, delegate or return unknown-tool error	EXT-2 → CMP-3 → CMP-1	one hop; unmatched names return an isError text block, not a protocol error	SRC-1:255–267
RTE-3	validation — four presence/type checks on thought, thoughtNumber, totalThoughts, nextThoughtNeeded; five optional fields cast without validation	CMP-1 internal	throw → RTE-8	SRC-1:29–56
RTE-4	totalThoughts coercion — if thoughtNumber > totalThoughts, raise totalThoughts to thoughtNumber on the record before retention	CMP-1 internal, mutates OBJ-1	one-way, upward only	SRC-1:90–92
RTE-5	history retention — unconditional append of OBJ-1 to OBJ-2	CMP-1 → OBJ-2	append-only; no eviction, dedup, ordering, or size bound	SRC-1:94
RTE-6	branch retention — append OBJ-1 to OBJ-3[branchId], creating the bucket on first use; requires both branchFromThought and branchId	CMP-1 → OBJ-3	append-only; the same object reference is in OBJ-2 too	SRC-1:96–101
RTE-7	status return — assemble and return OBJ-4	CMP-1 → EXT-2	echoes three caller-supplied fields (post-RTE-4), plus two values derived from retained state	SRC-1:106–117
RTE-8	error return — catch anything thrown, return OBJ-8 with isError	CMP-1 → EXT-2	no retry, no state rollback needed (nothing was written before validation)	SRC-1:118–129
RTE-9	stderr render — format OBJ-1 into OBJ-6, write to console.error	CMP-5 → process stderr	fire-and-forget; not part of the protocol response	SRC-1:58–84, 104
RTE-10	process lifecycle — connect transport, log a banner, process.exit(1) on fatal	CMP-4 → EXT-1	no retry, no reconnect, no graceful shutdown, no signal handling	SRC-1:269–278

Objects registered from lens returns (splits and claimed-only objects)

Registered after the lenses returned; the lens-local proposal tags are discarded and the mapping is recorded in result.md §8. Splits do not delete the parent record — the parent stays as the container, and route rows citing the parent remain valid where the split is not load-bearing.

ID	Object	Split of	Form	Truth-apt?	Evidence
OBJ-9	the thought payload — the single content-bearing field, one caller-authored natural-language string	OBJ-1	natural-language string	yes, per instance and caller-determined	SRC-1:14, 32–34, 46, 59, 82, 94
OBJ-10	the control-flag envelope — the other eight ThoughtData fields	OBJ-1	numeric/boolean/string control fields; four validated, five as-cast and erased at runtime	no (see RTE-4/a1)	SRC-1:15–22, 35–43, 47–54
OBJ-11	assertive block of the tool description — "When to use this tool" and "Key features"	OBJ-5	natural-language assertion, shipped static	yes — assertions about what the artifact does, with truth values over the artifact's own behavior	SRC-1:139–157
OBJ-12	directive block of the tool description — parameter guidance and "You should: 1–11"	OBJ-5	natural-language directive, shipped static	no — directives have no truth value	SRC-1:159–188
OBJ-13	the claimed "solution hypothesis" — the object CLM-1 says the tool generates and verifies. No in-boundary representation: absent from ThoughtData and from inputSchema	— (claimed only)	claimed only; no implemented form	yes by claim; ampliation established by the claim evidence, since pairing generation with verification presupposes non-entailment	named SRC-1:154–155, SRC-2:12; absence anchored SRC-1:13–23, 189–234
OBJ-14	echoed control fields of the tool result — thoughtNumber, nextThoughtNeeded, totalThoughts post-RTE-4	OBJ-4	JSON numbers/booleans	no — caller-sourced, no independent warrant	SRC-1:110–112
OBJ-15	derived state propositions of the tool result — branches and thoughtHistoryLength	OBJ-4	JSON array / number	yes — each asserts a fact about the artifact's own retained state	SRC-1:113–114

Claims (CLM-*) — orchestrator namespace; truth/scope/warrant fields owned by the epistemic lens

ID	Claim	Source anchor	Evidence layer
CLM-1	"Generate and verify solution hypotheses" / "Generates a solution hypothesis · Verifies the hypothesis based on the Chain of Thought steps · Repeats the process until satisfied · Provides a correct answer" — stated in a list headed "Key features" of the tool. Split by CLM-1/a1 into two channel instances below; CLM-1 is retained as the shared propositional content, so existing citations stay valid.	SRC-2:12; SRC-1:154–157	doctrine/design
CLM-1a	the README-channel instance of CLM-1: "Generate and verify solution hypotheses". Consumer: a human operator deciding whether to install. Channel: repository/package documentation. Horizon: the installation decision.	SRC-2:12	doctrine/design
CLM-1b	the prompt-channel instance of CLM-1, delivered into the model's context with the tool list. Consumer: EXT-3. Channel: OBJ-11 via RTE-1, path BAP-6. Horizon: the session. This is the consequential instance — the only one that can induce in-session reliance on a verification that does not occur.	SRC-1:154–157, delivery route SRC-1:251–253	doctrine/design
CLM-2	"Revise and refine thoughts as understanding deepens"; "You can question or revise previous thoughts"	SRC-2:9; SRC-1:150	doctrine/design
CLM-3	"Branch into alternative paths of reasoning"; "you can branch or backtrack"	SRC-2:10; SRC-1:153	doctrine/design
CLM-4	"Adjust the total number of thoughts dynamically"; "You can adjust total_thoughts up or down as you progress"	SRC-2:11; SRC-1:149	doctrine/design
CLM-5	Suited to "Tasks that need to maintain context over multiple steps"	SRC-2:38; SRC-1:146	doctrine/design
CLM-6	Suited to "Situations where irrelevant information needs to be filtered out"	SRC-2:39; SRC-1:146	doctrine/design
CLM-7	"provides a tool for dynamic and reflective problem-solving through a structured thinking process"	SRC-2:4; SRC-6:27	doctrine/design

Evidenced absences (ABS-*) — status absent, each with its recorded search boundary

ID	Absence	Recorded search boundary	Conclusion it prevents / supports
ABS-1	No durable persistence. No filesystem, database, or network write of any kind; the only dependencies are @modelcontextprotocol/sdk, chalk, yargs (unused).	all four subtree files, full text; SRC-3:21–25	Prevents any claim of cross-process or cross-session memory. Supports: retained state dies with the process.
ABS-2	No retrieval of retained thought content. No route returns a stored thought string. [amended ABS-2/a1] Retained state is read for content by nothing; on the write side at SRC-1:97,100 (bucket existence check and reference resolution); for derivation at SRC-1:113–114 (Object.keys, .length).	SRC-1, full file; every read of thoughtHistory (26, 94, 114) and branches (27, 97, 98, 100, 113) enumerated	Prevents any claim that the server supplies prior thoughts back into a caller's context.
ABS-3	No evaluator of thought content. RTE-3 checks JSON types only; nothing inspects, scores, compares, or verifies what a thought says.	SRC-1, full file	Prevents any claim that the artifact checks, verifies, or disposes a hypothesis. Directly bounds CLM-1.
ABS-4	No tests, fixtures, run logs, or execution traces.	subtree file listing (4 files) and repo root listing	Prevents every observed and causally supported status in this run.
ABS-5	No per-connection or per-session state isolation. One module-level thinkingServer instance (SRC-1:249) holds all state for the process lifetime.	SRC-1, full file	Prevents any claim of multi-session separation. Supports: state is process-global. In the shipped stdio deployment one process serves one client, so the practical exposure is bounded — but that bound comes from EXT-2's launch model, not from the artifact.
ABS-6	No revision operation. isRevision/revisesThought are stored on OBJ-1 and used only to choose a stderr label and caption (SRC-1:64–66). No prior entry is superseded, marked, replaced, or removed.	SRC-1, full file; all uses of both fields enumerated	Prevents any claim that the artifact applies a revision to retained history. Bounds CLM-2.
ABS-7	needsMoreThoughts is accepted by OBJ-7, validated nowhere, stored on OBJ-1, and never read.	SRC-1, full file; all occurrences enumerated (lines 21, 54, 228)	Prevents any claim that this parameter affects any behavior.
ABS-8	No downward adjustment of totalThoughts by the artifact. RTE-4 only raises it.	SRC-1:90–92, full file	Bounds CLM-4: "up or down" is a caller capability (the caller may send a smaller number next call), not an artifact behavior.
ABS-9	No filtering, summarization, compression, or relevance selection of any content.	SRC-1, full file	Bounds CLM-6.
ABS-12	No referential integrity on revision/branch pointers. revisesThought and branchFromThought are stored and never checked against thoughtHistory; a revision may point at a thought number that does not exist. (Registered from epistemic-lens proposal EPI-3.)	SRC-1 full file; all occurrences of both identifiers enumerated (:18–19, :52, :59, :66, :69, :96)	Prevents any claim that the retained revision/branch structure is a well-formed graph over retained thoughts. Distinct from ABS-6, which addresses revision application rather than pointer validity.
ABS-11	No invalidation, reset, or clear operation for retained state. Every occurrence of thoughtHistory (26, 94, 114) and branches (27, 97, 98, 100, 113) is an initializer, an append, a bucket create, or a derived read. No delete, splice, pop, shift, length = 0, or reassignment. No reset parameter in OBJ-7; no documented reset in SRC-2. (Registered from memory-lens proposal MEM-1.)	SRC-1 full file, both symbols fully enumerated; SRC-2 full file; OBJ-7 (SRC-1:189–234)	Prevents any claim that a caller, a session boundary, or the artifact itself can bound, scope, or expire what has accumulated. Supports: the only way to drop retained state is process termination, so retention duration is EXT-2's launch decision, not the artifact's. Distinct from ABS-1, ABS-5, ABS-6, none of which state the absence of a discard path.
ABS-10	No scheduler. Nothing in the artifact decides when the next thought happens: no timer, no loop, no callback registration, no continuation. nextThoughtNeeded is received and echoed unchanged (SRC-1:112).	SRC-1, full file	Prevents any claim that the artifact drives, paces, or terminates the thinking loop.

Behavioral-authority paths (BAP-*) — {consumer, channel, force, horizon}

ID	Path
BAP-1	{consumer: EXT-3, the model in the host session; channel: OBJ-12, the directive block of the tool description carried in the host's tool list; force: strong directive instruction — eleven numbered "You should" rules (SRC-1:177–188) plus parameter guidance, but nothing in the artifact can oblige compliance; horizon: for as long as the server is configured in the host and its tool list is in context} [amended BAP-1/a1: scope narrowed from OBJ-5 to OBJ-12; the assertive half of the same channel is now BAP-6. Superseded value: channel OBJ-5, the whole 54-line description.]
BAP-6	{consumer: EXT-3, and any human reading the README; channel: OBJ-11, the assertive block, carried in the host's tool list via RTE-1, plus SRC-2:6–12; force: belief-forming/assertive — it tells the consumer what the tool does, and four of its assertions have no implemented route; horizon: as BAP-1}. Registered because BAP-1 recorded only directive force. Without this path the CLM-1 mismatch reads as documentation drift rather than as an unsupported assertion delivered into a consumer's context.
BAP-2	{consumer: EXT-2, and through it EXT-3; channel: OBJ-4, the JSON status object in the tool result; force: informational — three echoed control fields and two derived state values, with no directive content and no enforcement; horizon: the single tool call that produced it, plus whatever transcript retention EXT-2 applies}
BAP-3	{consumer: none inside the boundary — a human operator or log collector attached to the process's stderr; channel: OBJ-6 on file descriptor 2; force: none implemented, no consequential consumer exists within the boundary; horizon: process lifetime}
BAP-4	{consumer: EXT-2's argument construction, then RTE-3 server-side; channel: OBJ-7, the JSON Schema in the tool spec; force: enforcing on argument shape — RTE-3 rejects a call missing any of four required fields; horizon: same as BAP-1}
BAP-5	{consumer: EXT-2's process supervisor; channel: process exit code 1 on fatal transport error (SRC-1:275–278); force: terminating — the artifact removes itself rather than degrading; horizon: one process lifetime}

Amendments registered from lens returns

Each is a finding about a registered record, carrying its evidence anchor and any superseded value, cited through the ID of the record it annotates. Lens-local proposal tags are discarded at registration and do not appear in the emitted result; the mapping is recorded in result.md §8.

Amendment	Annotates	Finding	Evidence anchor	Superseded value
OBJ-3/a1	OBJ-3	branches bundles two parts with different consumers, checks, and authority paths: the key set is consumed by RTE-7 and travels BAP-2 to EXT-3; the bucket contents have no consumer anywhere in the boundary — no route ever reads a bucket's elements.	SRC-1:113 (keys read) vs SRC-1:96–101 (buckets written, never read for elements)	none — the single-row description is amended, not replaced
OBJ-4/a1	OBJ-4	The branches field is verbatim accumulated caller text, not a derived summary: the derivation is in selection only (keys, not values), and the returned tokens are the exact strings EXT-3 supplied on earlier calls, admitted without validation. It is therefore the only accumulated caller-authored text that ever returns to a consumer. It has no cap and no discard path (ABS-11), so it grows monotonically with distinct branchId values and never shrinks.	SRC-1:53, SRC-1:113	the "two values derived from retained state" characterization in the RTE-7 progression field
OBJ-4/a2	OBJ-4	thoughtHistoryLength is a process-lifetime counter of accepted calls, not a measure of the current thinking sequence. It counts revision and branch thoughts alike, never resets (ABS-11), and with one module-level instance (ABS-5) spans every thinking episode the process handles. It can diverge arbitrarily from the thoughtNumber echoed two fields above it in the same JSON object, and a second episode starting at thoughtNumber: 1 receives a count carrying the first episode's calls. Bounds CLM-5.	SRC-1:94, 110, 114, 249	none
OBJ-1/a1	OBJ-1, and by reference RTE-4, RTE-5, RTE-6	Retention is by shared reference, and the retained record is the mutated one. RTE-4 mutates totalThoughts in place before both retention writes; the same object reference then enters thoughtHistory and, when eligible, a branches bucket. Consequences: exactly one copy, so the two containers cannot diverge and carry no provenance separation; retained history preserves the coerced value, not what the caller sent; formatThought renders the post-coercion value too, so not even the stderr trace preserves the original. The artifact's single write-over of acquired data is silent and unrecorded.	SRC-1:88–104	none
RTE-6/a1	RTE-6	The branch-eligibility predicate branchFromThought && branchId (SRC-1:96) is a truthiness test on two unvalidated fields (SRC-1:52–53). A call supplying branchId but omitting branchFromThought, or sending a falsy value for either, produces no bucket, no error, and no signal: the thought lands in thoughtHistory and the label vanishes. Because the key set is the only accumulated authored text that returns (OBJ-4/a1), a silent write-side drop is a silent read-back loss, visible to the caller only as a label that never appears. Both lenses reached this independently; the epistemic lens adds that branchFromThought: 0 is falsy here while the schema's minimum: 1 would have excluded it, so the bypass is reachable only from a caller that skips EXT-2's validation.	SRC-1:52–53, 96–101, 113	none
RTE-3/a1	RTE-3	"Four presence/type checks" is imprecise in a load-bearing way: three of the four use a falsy guard, not a presence guard (!data.thought, !data.thoughtNumber, !data.totalThoughts); only nextThoughtNeeded uses typeof alone. Consequence: the entire set of content constraints the artifact applies to the truth-apt payload is not the empty string, and it arrives accidentally through falsy coercion rather than by declaration — OBJ-7 declares no minLength.	SRC-1:32–43 vs SRC-1:192–195	none; record amended
RTE-4/a1	RTE-4	Determination on the direct-adaptation hand-off, returned as requested by SCOPE-EPI: non-truth-apt policy/content update — concurrence, not correction. totalThoughts as a field is arguably truth-apt (documented as an "estimate of thoughts needed"), but the update applies no evaluator to the estimate's subject matter, consults nothing but the two integers in the current request, and repairs the invariant totalThoughts >= thoughtNumber so the stderr header never reads 9/5. The artifact holds no criterion of "needed"; that criterion lives at SRC-1:188, in EXT-3's self-assessment. Scope was not expanded.	SRC-1:90–92, :75, :170, :188	none
RTE-9/a1	RTE-9, OBJ-6	Fidelity bound on the reshaping. Content is preserved verbatim (padEnd pads, never truncates; the border is sized to the payload). But the renderer assumes a single-line payload, and multi-line chain-of-thought text — the normal shape — produces a border sized to the whole string and a broken box. The render also drops nextThoughtNeeded and needsMoreThoughts, and computes its revision/branch caption from unvalidated fields, so isRevision: "banana" renders as a revision. Content lineage is preserved; presentational structure and caption reliability are not.	SRC-1:58–84 with SRC-1:50	none
RTE-8/a1	RTE-8	The registered parenthetical "no state rollback needed (nothing was written before validation)" is true about validation but does not support the conclusion. The writes at SRC-1:94 and :96–101 precede two further operations inside the same try: formatThought (:103) and JSON.stringify (:109). A throw from either returns isError: true with OBJ-2 and OBJ-3 already mutated. Practical exposure over stdio is negligible (it needs a pathologically large thought to raise RangeError from '─'.repeat(n)), and the record is filed at that weight. The epistemic consequence is what matters: an isError response does not warrant the proposition "nothing was retained". (The lens proposed this as a possible third correction and declined on practical weight; the orchestrator concurs — the parenthetical is imprecise rather than misleading at the scope stated, so it is amended, not corrected.)	SRC-1:87–129, ordering at :94, :96–101, :103, :109	the parenthetical's implied scope
OBJ-8/a1	OBJ-8	The artifact's diagnostic propositions are not uniformly true. thought: "" conforms fully to OBJ-7 ({type: "string"}, no minLength) yet fails the falsy guard and is returned "Invalid thought: must be a string" — which is false of the input, since "" is a string. The same pattern makes "Invalid thoughtNumber: must be a number" false for 0, though 0 is excluded by the schema's minimum: 1 and so reaches RTE-3 only from a caller bypassing EXT-2. Consequence: RTE-8 warrants reliance on the fact of rejection but not on the stated reason. Verified independently by the orchestrator against SRC-1:32 and SRC-1:192–195.	SRC-1:32–43 vs SRC-1:192–209	none
ABS-3/a1	ABS-3	The absence is accurate and can be sharpened one stage earlier: the artifact has no representable check target for CLM-1's verification claim. OBJ-7's nine properties contain no hypothesis marker and ThoughtData has no such field — while the schema does individuate other thought kinds (isRevision, revisesThought, branchFromThought, branchId), so the omission is not a general refusal to type thought kinds; hypotheses specifically are unrepresentable. The verification claim therefore fails not merely for want of an evaluator but for want of anything to evaluate, and could not be implemented against the current protocol without a schema change.	SRC-1:189–234, SRC-1:13–23	none
BAP-4/a1	BAP-4	The registered force "enforcing on argument shape" holds only for the four required properties. Server-side, nothing enforces OBJ-7's minimum: 1 constraints on thoughtNumber, totalThoughts, revisesThought, branchFromThought, nor the declared types of the five optional properties, which are as-cast and erased at runtime. Those constraints live only in EXT-2, which is uninspected. For a caller speaking JSON-RPC directly, BAP-4's enforcing force covers 4 of 9 properties and no value ranges.	SRC-1:29–56 vs SRC-1:189–234	the unqualified "enforcing on argument shape"
CMP-2/a2	CMP-2	Companion to CMP-2/a1 (tool-name mismatch): a parallel parameter-name mismatch inside the same object. The in-prompt parameter documentation names eight of nine parameters in snake_case (next_thought_needed, thought_number, total_thoughts, …) while OBJ-7 declares and RTE-3 requires camelCase. SRC-2:21–29 uses camelCase, so the README agrees with the schema and the in-prompt text does not. Bearing: CLM-4's in-prompt instance ("You can adjust total_thoughts up or down") names a parameter the schema will not accept. Force is weak — a capable consumer follows the schema — and it is recorded at that weight.	SRC-1:149, 168–175 vs SRC-1:189–234	none
CLM-1/a1	CLM-1	CLM-1 conflated two claim instances with the same propositional content but different consumer, channel, and horizon. Split into CLM-1a (README channel, human operator, installation decision) and CLM-1b (prompt channel, EXT-3, session). Only CLM-1b can induce in-session reliance on a verification that does not occur. CLM-1 is retained as the shared propositional content so existing citations remain valid.	SRC-2:12 vs SRC-1:154–157, delivery at SRC-1:251–253	the single-instance framing
OBJ-5/c1	OBJ-5	Correction, not amendment. OBJ-5 was registered as "54 lines of instruction addressed to the model in the second person" — misclassified by the very criterion the record states. SRC-1:135–146 is third-person description; :148–157 switches subject mid-list, items 6–9 dropping the subject to assert what the tool does; only :177–188 is the numbered second-person block. Classifying the whole object as directive would have made its assertive content invisible, and licensed the conclusion that OBJ-5 cannot mislead because instructions have no truth value. It can. Remedy: split into OBJ-11/OBJ-12, narrow BAP-1, register BAP-6.	SRC-1:135–188, contrast :154–157 with :184–187	"54 lines of instruction … in the second person"

Record 5 — Runtime account

Scheduling, context assembly, and external state/action are treated as causal responsibilities, not module boundaries. In this artifact one of the three is almost entirely absent, and saying where it went is the main runtime finding.

Material loops

A loop is material when it alters the analysis question, a control path, evidence strength, or a lens result.

LOOP-A — protocol serve loop (partly external)

field	value
trigger/input	process launch by EXT-2 (npx -y @modelcontextprotocol/server-sequential-thinking, SRC-2:47–58), then JSON-RPC messages on stdin
next-step owner	EXT-1's transport and dispatcher — uninspected
decision policy and form	method-schema → handler map, populated by two setRequestHandler calls (SRC-1:251,255); symbolic, static, exhaustive at two entries
context selection and framing	none; RTE-1 returns the single tool spec verbatim with no filtering or parameterization
state reads and writes	none at this level
action executor and boundary	process-local only: stdout for protocol, stderr for OBJ-6 and the startup banner (SRC-1:272). No filesystem, network, or subprocess access anywhere (ABS-1)
persistence	none
coordination and return	single-process, single-transport, request/response; no concurrency control, no queue
retry / cancellation / recovery	none implemented in the boundary. No cancellation handling, no reconnect, no signal handler, no graceful shutdown. A fatal transport error exits the process (RTE-10, BAP-5). Any retry lives in EXT-2.
output	tool list, or a tool result
evidence	SRC-1:237–278; EXT-1 internals uninspected

LOOP-B — per-call thought-processing loop (fully inside the boundary)

field	value
trigger/input	a CallTool request whose params.name === "sequentialthinking" (SRC-1:256)
next-step owner	CMP-1.processThought; returns synchronously, owns nothing after return
decision policy and form	straight-line procedure with three conditionals — validity (RTE-3), overflow coercion (RTE-4), branch-bucket eligibility (RTE-6). Symbolic, fully determined by the request; no model call, no configuration, no randomness
context selection and framing	none. The artifact selects nothing into anyone's context. It emits OBJ-4, a fixed five-field shape computed the same way on every call
state reads and writes	writes: OBJ-2 always (RTE-5), OBJ-3 conditionally (RTE-6), and a mutation of the incoming OBJ-1 (RTE-4). Reads: OBJ-2.length and Object.keys(OBJ-3) only (ABS-2)
action executor and boundary	no external action. RTE-9 writes to stderr; that is the only side effect leaving the process besides the protocol response
persistence	in-memory, process lifetime, unbounded growth, no eviction (ABS-1, RTE-5)
coordination and return	one JSON text block; nextThoughtNeeded is passed through unchanged — the artifact expresses no opinion about continuation (ABS-10)
retry / cancellation / recovery	one try/catch converting any throw into OBJ-8 with isError: true (RTE-8). No retry, no compensation. Failure is total for the call and invisible to retained state
output	OBJ-4 on success, OBJ-8 on failure, plus OBJ-6 on stderr on success only
evidence	SRC-1:86–130

LOOP-C — the advertised thinking loop (crossing loop; declared partial)

field	value
trigger/input	EXT-3 decides a problem warrants structured thinking
next-step owner	EXT-3, outside the boundary. This is the finding: the artifact holds no scheduling responsibility for the loop it is named after (ABS-10)
decision policy and form	OBJ-5 — 54 lines of natural language, delivered once through BAP-1. Representational form is natural-language instruction; its force is directive in tone and unenforceable in fact
context selection and framing	EXT-2's transcript carries the prior thought strings, because the model wrote them into its own turns. The artifact contributes only OBJ-4 (BAP-2)
state reads and writes	the artifact's writes (OBJ-2, OBJ-3) are invisible to this loop except through the two derived values in OBJ-4
action executor and boundary	EXT-3/EXT-2
persistence	the host transcript, outside the boundary
coordination and return	iteration is the caller repeating LOOP-B; the artifact neither counts down nor terminates it
retry / cancellation / recovery	entirely EXT-2's
output	whatever answer EXT-3 produces
evidence	doctrine only for the loop's existence (CLM-1–CLM-7); the artifact-side half is implementation-grounded
limitation	Boundary kind complete artifact, partial loop: no conclusion in this run describes the behavior LOOP-C produces.

Anti-conflation checks (step 4.3)

• A filesystem is not a scheduler — and here neither exists. OBJ-2 is an in-memory array; the absence of a scheduler is recorded as ABS-10, not inferred from the presence of storage.
• Retaining material is not selecting it into context — RTE-5/RTE-6 retain; nothing selects. The gap between them is ABS-2 and is the central runtime fact about this artifact.
• A tool schema present in context is not tool execution — RTE-1 places OBJ-5/OBJ-7 in a host's tool list. That is presence. Execution is RTE-2, and no evidence in this register shows either occurring in a real session (ABS-4).

Conditional surface inspection (step 4.4)

Included only where materially altering the analysis question, a control path, evidence strength, or a lens result:

• Observability (material: it is the only consumer-facing output besides the protocol response, and it is the only place a retained thought's content ever leaves the process). RTE-9/OBJ-6 renders each thought to stderr with a revision/branch label. It has no in-boundary consumer (BAP-3). Consequence for the lenses: content leaves via a channel the model never reads, which sharpens the read-back finding rather than softening it.
• Packaging/distribution (material: it fixes what "the system" is, and it carries two defects that bear on doctrine–implementation agreement). CMP-6, with amendments CMP-3/a1 (version disagreement) and CMP-6/a1 (unused yargs).
• Permissions and governance — inspected and found to have no surface: the artifact requests no capabilities beyond tools: {} (SRC-1:243–245), touches no resource outside its process, and applies no authorization to callers. Recorded because a reader would otherwise wonder; not developed further, as it alters no lens result beyond confirming ABS-1.
• Providers, user interface, and performance were not inspected: no provider integration exists, there is no UI, and no performance evidence exists in the register (ABS-4). Their omission prevents no conclusion this run makes.

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Notes for lens workers

• Cite by the IDs above. Do not rename or re-inventory a registered object or route.
• Propose new records under a lens-local tag (MEM-n, EPI-n) and state each proposal's identity (file path, symbol, route endpoints) so the orchestrator can register it canonically.
• If you find a registered record defective — false, misclassified by its own stated criterion, or accurate but misleading at the scope stated — return the correction with its evidence anchor instead of re-inventorying.
• You may make targeted reads inside the frozen boundary (the four files under /home/zby/llm/servers/src/sequentialthinking/ plus the root manifests named in SRC-5/SRC-6), read-only. Report any read you made so it can be added centrally. Do not fetch, pull, refresh, or widen sources.
• Do not decide publication. Do not assign a system-wide grade.