[Clear1nsight]

Change and mathematical scope

Adds a genuine descriptor-relative namespace-classification component for the next C05 prerequisite. It replaces supplied per-path absence/object-kind facts with its own native no-follow component lookups and held O_PATH descriptors. The pre-existing owner retains raw metadata, errors and known descriptor ownership; successful diagnostic projection keeps all complete-qualification flags false.

The implementation distinguishes regular-content-unread, directory-membership-unenumerated, unresolved symlink, unsupported special object, nondirectory prefix and absence-at-pinned-parent. It does not follow intermediate or final symlinks while claiming no-follow behavior. Known descriptor ownership is consumed before one close attempt; admitted-operation/projection failures quarantine subsequent acquisition in this module. A real ENAMETOOLONG control verifies primary identity and cross-instance refusal without a private reset or replaced native primitive.

Partial prerequisite only. The primitive does not derive the installed compiler's effective search chain, read regular contents, resolve aliases, produce an ordinary source_files row, durably capture evidence, authenticate the original Root, or establish absolute/compilation-interval stability. The active-owner check is not a thread lock: this partial interface requires serialized nonreentrant calls and explicit protected-dispatch/noninterference premises. These are not newly accepted original C05 assumptions. Open-return ambiguity remains pending/quarantined; adverse close/delivery and original owner integration remain unqualified.

Task and overlap

• Explicit user request: continue by consulting Pro, implementing and contributing upstream. This follows the completed C05 source-roots consultation and its published predecessor.
• Canonical base 7c49fe32c55de02c2c873655c804b16e4c3fef0a; public head 84b0e70ba4da44b7904fe8d13903c26a3a8239e1; exact checked tree 5c9f311a0abb0b790de0e0a192c3daeddec1e878.
• Ten new files under research/h25-c05-namespace-observer/, one commit, no shared/frozen source edits or unmerged executable dependency.
• Immediate predecessor Construct C05 source roots and conditional header prefixes #6354 b3771dbc5f713ba3e90170c1dc3321e653222c65 constructs fixed roots and a conditional prefix certificate over supplied lookup facts. This contribution adds actual namespace observations; it does not repeat or run that predecessor. Resolve V03 entry preflight and dependency source questions #6352 publishes earlier V03 source resolutions; Clarify original G12 caught-primary and accounting scope #6351 clarifies original G12 scope. PR6321/6029/5864 and separate Cursor/h25 g12 identity cleanup 5d9d #6339/Repair bounded G12 custody cleanup and publication-size checks #6346/Record G12 acquisition and raw-error delivery boundaries #6347 scopes/credit are retained.
• Fresh metadata for the declared 21-node lineage, all-state C05/caller/namespace overlap searches, and the H25 hub were checked. No newer C05 implementation was found within that scope; this is not a global novelty/exhaustiveness claim. Current main/rules were refreshed before publication.
• Scope changed from the retained portable-replay card to the explicitly assigned C05 source-observation prerequisite. Full original C05 and V03 are not narrowed or declared complete.
• The completed actual Pro follow-up supplied the two source files. Observer SHA256 d52913c0e0a25457aa1fac39459321134304a15ac7788bd0115ddf3c8a2ba882 (11,960 bytes) and proposed fixture controls ed1ddeff64acf69900e55ac00a38bdf1b6d249a6fc4e5843cd372f9b95618dd7 (6,653 bytes) are unchanged. Codex independently audited them and authored the separate control suite/runner. Pro reported AI source review, not executed validation or inspectable human acceptance.

Validation

Executed locally on Python 3.12.3:

python3 -B scripts/research_package.py --package research/h25-c05-namespace-observer --check-only
python3 -B scripts/research_package.py --package research/h25-c05-namespace-observer
python3 -B scripts/check_research_commit.py --package research/h25-c05-namespace-observer

Metadata/pins, all four registered commands and the ten-file committed-byte preflight passed. Each Python profile (normal and optimized) passed the two Pro-proposed test methods and independent controls covering 18 successful observation scenarios, 14 pure input refusals, 133 closed-descriptor EBADF probes, one actual ENAMETOOLONG/quarantine control and two temporal counterexamples. The 526 internal checks per independent run are not 526 independent families or original activities.

Fixture expectations are fixed independently before candidate observation. Controls include distinct and empty regular objects, mode-zero classification without a readability claim, final/intermediate/dangling symlinks, FIFO, PCH object alternatives, hardlink path distinction, the exact 64-component/65-descriptor positive, actual error retention and post-failure acquisition refusal. Outcome ABA demonstrates absence/presence/absence; complete metadata endpoint equality is not claimed. A separate real-OS ancestor rename demonstrates that a held directory need not remain at its old absolute spelling.

Only this new component and fresh owned temporary fixtures were executed. The suites create no subprocess and import no original Root/provider/producer/helper or archived candidate. No compiler, native extension build, historical control, target process or scientific workload was executed. Fixtures and raw local output are retained. An initial sparse-staging refusal and premature pre-commit byte-check failure are preserved locally; staging was corrected only for the new package. A validation-field wording clarification changed no tested Python bytes. No functional source repair was needed.

Exact remote branch, tree and sole canonical parent were read back. Hosted checks are pending at submission. The fixed 60-minute unit has its own source gate, 30-minute no-progress stop and hard deadline; it does not restart the old V03 round. Local source bounds (at most 65 held FDs and 324 Python-level primitive invocations per supported path) are not kernel-syscall, wall-time or complete-cost bounds. Original limits (512 rows, 64 MiB/file, 256 MiB/capture) and parent fit obligations remain unchanged. Original weighted completion stays 43.5%, stage 2/10, milestones 1/10 and component denominator 24. Whole C05/V03/O03, source adoption, performance and kappa credit remain open; unknown costs remain OPEN_NOT_ZERO.

Credit

Chris R / Clear1nsight with substantial ChatGPT Pro construction/reported AI source-review and OpenAI Codex independent assessment/control/publication assistance. Retain original source/reviewer, PR6321/6029/5864, unpaidmoon/Cursor Grok PR6339 and Douglas R. Colkitt's circuit/network/native/verification attribution. New code/analysis Apache-2.0. AI assessment and finite filesystem checks are not human or proof-kernel acceptance.

Open next questions

Bind the installed configured toolchain's source/build rules and actual inherited caller context; derive complete search/expansion, alias/content/PCH handling and genuine original Root/writer/compilation-interval currentness integration. Prove whole-domain witness representation and complete fit/cost under unchanged limits. The smallest consequential next source step is an exact rule/context adapter for the pinned original executable; distribution correspondence is still missing. See README and TASK.json for the conditional argument, explicit unexecuted adverse cases and next dependency. No new trust premise, original execution budget or automatic prior-round restart follows from this contribution.

[Clear1nsight]

Exact publication readback is complete at head 84b0e70ba4da44b7904fe8d13903c26a3a8239e1, tree 5c9f311a0abb0b790de0e0a192c3daeddec1e878, sole canonical parent 7c49fe32c55de02c2c873655c804b16e4c3fef0a: one commit, ten intended added files, draft and maintainer edits disabled. Frozen title/body and every changed file blob match the checked local package.

Hosted run 41394202395 completed attempt 1 successfully: plan job 125111910328 and actual bounded replay job 125113260416, including unchanged committed inputs. Local metadata/pins, all four normal/optimized registered commands and the ten-file committed-byte preflight also passed. Per profile, the independent suite records 18 successful observation scenarios, 14 input refusals, 133 actual EBADF closure probes, one real ENAMETOOLONG/quarantine control and two temporal counterexamples. Pro's two proposed test methods also pass. No functional source repair was needed.

The canonical completion handoff records the completed actual Pro consultation, exact source identities, retained evidence, conditional contract and smallest next task. The module-local guard is not a lock; serialized nonreentrant callers and protected native/singleton state are explicit local premises. Open-return ambiguity, adverse close/delivery, original Root/writer integration, complete compiler rules/content/alias expansion, compilation-interval currentness and complete fit/cost remain open.

This delivers the bounded new observation component only. Full C05/V03/O03, original whole-activity credit, source adoption and performance/kappa remain unclaimed. Original weighted completion stays 43.5%, with unknown costs OPEN_NOT_ZERO. Only the new code and owned temporary fixtures ran; original compiler/Root/provider/producer/helper, native extension and scientific workloads did not run. The original stopped rounds and all original selections remain unchanged.