tegwick
d32774da51
Assistant: codex Assistant-Model: gpt-6-astra Assistant-Session: 01a0cffe-206f-7323-89d3-b20ca4cf4bf9
75 lines
5.4 KiB
Markdown
75 lines
5.4 KiB
Markdown
# First prospective navigation cycle — 2026-09-27
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Author/reviewer: Codex, author-model; no independent human validation. Stream B,
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LEARN-0011. [Registered protocol](../evolution/cycles/2026-09-27-navigation.md) committed
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as `f3697c1` before implementation/execution. [Runner and reproduction](../experiments/navigation-history/README.md),
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[complete receipt](../experiments/navigation-history/result.json),
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[partial first run](../experiments/navigation-history/initial-partial.json).
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## Evidence and observations
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Real htmx 2.0.11 in an authored public-catalog server; Playwright 1.63.0, Chromium
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151.0.7922.34 and Firefox 155.0. Dependencies locked, inputs and browser binaries
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hashed in the complete receipt. Existing [htmx history/cache documentation](https://htmx.org/docs/)
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was consulted for mechanism context (accessed local date 2026-09-27, living revision
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unknown); execution is evidence only for the pinned package and declared server policy.
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| Claim | Registered checks | Observation in both browsers |
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| --- | --- | --- |
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| NH01 | N01/N02 | Direct filtered entry, native link/GET form, enhanced navigation, reload and fresh direct entry preserve selection; document entries include the shell |
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| NH02 | N03/N04 | Snapshot back/forward makes no additional article request; evicting the pinned sessionStorage history cache causes a history-restore request and full response |
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| NH03 | N05/N06 | Enhanced 503 leaves the old committed URL/content; explicit native recovery works. A failed htmx script load leaves native link/form usable |
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| NH04 | N07/N08 | Correct Vary selection returns full versus fragment content in both population orders; N08's final full fetch recontacts the server, not proof that both variants stay cached |
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| NH05 | N09 | Without Vary, the browser reuses the cached fragment as a full document, loses the shell, and sends no additional request |
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| NH06 | N10 | Explicit Node requests receive 304 for a matching representation validator and 200/full body for the other representation; a history-restore selector returns full content |
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20/20 registered rows met expectations, including the intentionally broken N09.
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There are 18 browser cases and the same explicit HTTP sequence repeated twice; do
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not describe N10 as browser automatic revalidation. Snapshot hits restore selected
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views, not a tested guarantee of current publisher bytes. HTTP cache and htmx history
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storage are different mechanisms. Vary names both HX-Request and
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HX-History-Restore-Request because both influence the fixture's representation.
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The fixture's historyRestoreAsHxRequest=false is explicit, not a claim about defaults.
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The first run completed ten Chromium rows, then failed to locate Firefox in its
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default installation path. Its incomplete receipt is preserved. The second run used
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the existing `/tmp/fep-playwright-browsers` installation and unrestricted temporary
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profile access. No source/criteria changes between runs; repetition is not new learning.
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No unexpected assertion failure was discarded. Initial launch error: executable absent
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at `/home/worsch/.cache/ms-playwright/firefox-1543/firefox/firefox`.
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## Learning disposition: corroboration
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Before: documentary evidence and synthetic reasoning predicted native contracts,
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history recovery and representation-aware caching were necessary for coherent routes.
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After: one pinned library plus our server policy supplies bounded runtime support,
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including a concrete fragment-as-document counterexample when cache selection is broken.
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The existing obligations stand; no new pattern or consequential conceptual revision is
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claimed. Updating evidence text is not automatically a new discovery. This is one
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question/outcome, not twenty discoveries, and not independent deployed recurrence.
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CAND-0009 and CAND-0010 remain draft/hypothesis. VC-03 remains provisional: its tested
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read-only navigation subset is stronger, while keyboard/focus/announcements, delayed
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script activation, interrupted transport, invalid/deleted routes, numerical delivery
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budgets and offline availability remain open. Native recovery was explicitly offered
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by the fixture; no automatic fallback or full accessibility claim follows. No real
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CDN/intermediary, private cache policy or publisher-freshness guarantee was tested.
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## Measurement and next decision
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[Effort receipt](../evolution/cycles/2026-09-27-navigation-effort.json) records the
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monotonic measured window and subtracted execution intervals. Active time includes
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registration, fixture development, source inspection, analysis and recording. The
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initial orientation is excluded; subprocess execution includes the failed launch and
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full rerun. Administrative commit/snapshot/sync time after cutoff is unmeasured overhead.
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This is single-agent elapsed effort, not human labor or model compute time. Token/cost
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telemetry is unknown. Brief checkpoint inspection during execution is assigned wholly
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to execution, never counted twice. Clock start UTC label was read during orientation;
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monotonic start after orientation is the duration authority.
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No diminishing-returns claim follows from one corroborating cycle. WP-0006 T03 keeps
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comparison-window review and review-date reconciliation open. WP-0003 T01 next owns
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bounded keyboard/focus/error-feedback checks if we continue this navigation stream;
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use a new comparison group if the accessibility question/protocol is materially different.
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WP-0003 T02 still owns the independent walkthrough review and offline branch. M1/M2,
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independent human review and language usefulness remain unresolved.
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