KERYX
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Archived dispatch

Using https://www.sqlite.org/wal.html and https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md, propose a restart drill for a local research-job queue. Distinguish database guarantees from application-level deduplication choices. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward.

Lowconfidence— Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: 1 sub-claim remains below the evidence threshold

· llm:deepseek:deepseek-v4-pro

§ IIThe reading3 cited
Lowsource grounding— Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: 1 sub-claim remains below the evidence thresholddeep researchpreview plan 3/3 claimsportfolio 3/10 · evidence 100%

> ⚠ Low confidence — Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: 1 sub-claim remains below the evidence threshold. Treat this as provisional.

Model-written summary with sentence-level citations. Each sentence is followed by the verbatim source text it was checked against; sentences without a qualifying excerpt were removed.

Research target 1

Requested topic (unverified): “What database guarantees does SQLite WAL mode provide for a local research-job queue, particularly regarding durability, atomicity, and recovery after a crash or restart?”

SQLite WAL mode automatically replays committed transactions from the WAL into the main database when the first connection opens after a crash or restart. Source text: “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.”

Writers sync the WAL on every transaction commit only when PRAGMA synchronous is FULL; with NORMAL, the sync is omitted, sacrificing durability after a power loss or hard reboot. Source text: “(Writers sync the WAL on every transaction commit if PRAGMA synchronous is set to FULL but omit this sync if PRAGMA synchronous is set to NORMAL.)”

Research target 2

Requested topic (unverified): “What application-level deduplication choices are relevant for a local research-job queue, and how do they differ from database guarantees?”

The buyer client writes a durable job journal during the buy command, which is an application-level record used for recovery, distinct from SQLite's own WAL guarantees. Source text: “The buy command obtains a fresh quote, checks the payment policy again, writes a durable job journal, signs once and submits once.”

Resume does not sign a new authorization or replay a purchase, showing application-level deduplication choices that prevent duplicate debits. Source text: “It does not sign a new authorization or replay a purchase.”

Evidence gap: the recorded assessment remains below the support threshold for this target.

Research target 3

Requested topic (unverified): “What specific restart drill steps can be derived from the WAL documentation and the buyer-recovery engineering doc for a local research-job queue, ensuring that database guarantees and application-level deduplication are clearly distinguished?”

On restart, the first connection to open the database automatically runs WAL recovery, replaying committed transactions from the WAL to the main database. Source text: “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.”

After a connection failure or process restart, the application should use the resume command with the same job directory, relying on the durable job journal rather than re-buying. Source text: “After a connection failure or process restart, use the resume command with the same job directory.”

Summary sentences are model-written and model-checked, not independently verified; they claim no more than their excerpts and are not a complete synthesis. Excerpts establish source grounding, not that a source is correct. Source statements may be wrong or conflicting. Payment states remain in the separate receipt.

Supplied original source status

  • https://www.sqlite.org/wal.html: Bounded text extracted from https://www.sqlite.org/wal.html; qualifying excerpts retained.
  • https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md: Bounded text extracted from https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md; qualifying excerpts retained.

Evidence ledger — recorded source excerpts

Research targets are unverified topics. Coverage is an estimate of excerpt support, not proof of entailment, factual truth or a complete answer.

  1. Requested topic (unverified): “What database guarantees does SQLite WAL mode provide for a local research-job queue, particularly regarding durability, atomicity, and recovery after a crash or restart?”

    90% estimated
    “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.” [S1] SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research
    “(Writers sync the WAL on every transaction commit if PRAGMA synchronous is set to FULL but omit this sync if PRAGMA synchronous is set to NORMAL.)” [S2] Write-Ahead Logging

  2. Requested topic (unverified): “What application-level deduplication choices are relevant for a local research-job queue, and how do they differ from database guarantees?”

    0% estimated
    “The buy command obtains a fresh quote, checks the payment policy again, writes a durable job journal, signs once and submits once.” [S3] keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub
    “It does not sign a new authorization or replay a purchase.” [S3] keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub

  3. Requested topic (unverified): “What specific restart drill steps can be derived from the WAL documentation and the buyer-recovery engineering doc for a local research-job queue, ensuring that database guarantees and application-level deduplication are clearly distinguished?”

    50% estimated
    “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.” [S1] SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research
    “After a connection failure or process restart, use the resume command with the same job directory.” [S3] keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub
What if a source were missing?

Temporarily leave out one source to see which research targets retain excerpts in this report.

Showing the original excerpt ledger.

  1. What database guarantees does SQLite WAL mode provide for a local research-job queue, particularly regarding durability, atomicity, and recovery after a crash or restart?

    2 recorded excerpts remain.

    Inspect remaining excerpts

    “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.”

    S1 · zylos.ai · SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research · version f31feb12b9458f5f4cffc77647a63d36bba488a0d3ca1acd3d3bcc00b5f31b30

    “(Writers sync the WAL on every transaction commit if PRAGMA synchronous is set to FULL but omit this sync if PRAGMA synchronous is set to NORMAL.)”

    S2 · sqlite.org · Write-Ahead Logging · version a100a9b383334871465475aea40acc576f20c9d38617be257881115e0ee6b53f

  2. What application-level deduplication choices are relevant for a local research-job queue, and how do they differ from database guarantees?

    2 recorded excerpts remain.

    Inspect remaining excerpts

    “The buy command obtains a fresh quote, checks the payment policy again, writes a durable job journal, signs once and submits once.”

    S3 · github.com · keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub · version 1448f7113a28ea235025464dd607223e2930ee2682a49c5aeaf781b6ff89ff4b

    “It does not sign a new authorization or replay a purchase.”

    S3 · github.com · keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub · version 1448f7113a28ea235025464dd607223e2930ee2682a49c5aeaf781b6ff89ff4b

  3. What specific restart drill steps can be derived from the WAL documentation and the buyer-recovery engineering doc for a local research-job queue, ensuring that database guarantees and application-level deduplication are clearly distinguished?

    2 recorded excerpts remain.

    Inspect remaining excerpts

    “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.”

    S1 · zylos.ai · SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research · version f31feb12b9458f5f4cffc77647a63d36bba488a0d3ca1acd3d3bcc00b5f31b30

    “After a connection failure or process restart, use the resume command with the same job directory.”

    S3 · github.com · keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHub · version 1448f7113a28ea235025464dd607223e2930ee2682a49c5aeaf781b6ff89ff4b

Targets are requested topics, not verified assertions. Excerpts do not prove truth or independent corroboration. This view keeps the answer, confidence and payments unchanged and makes no new requests.

Research evidence matrix

Compare unverified research targets with cited sources and inspect recorded excerpts. An empty cell means no inspectable excerpt was recorded; it does not establish whether a claim is true, false, or disputed. Coverage and agent confidence do not prove entailment, measured accuracy or complete synthesis.

Research target by cited source evidence matrix
Research target (unverified)Inspection status[S1] SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos ResearchPublication: zylos.aiPublished: Not recorded[S2] Write-Ahead LoggingPublication: sqlite.orgPublished: Not recorded[S3] keryx/docs/engineering/2026-09-08-buyer-recovery.md at main · tang-vu/keryx · GitHubPublication: github.comPublished: Not recorded
What database guarantees does SQLite WAL mode provide for a local research-job queue, particularly regarding durability, atomicity, and recovery after a crash or restart?Recorded excerpt
Inspect 1 excerpt
When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.
Inspect 1 excerpt
(Writers sync the WAL on every transaction commit if PRAGMA synchronous is set to FULL but omit this sync if PRAGMA synchronous is set to NORMAL.)
No excerpt recorded
What application-level deduplication choices are relevant for a local research-job queue, and how do they differ from database guarantees?Recorded excerptNo excerpt recordedNo excerpt recorded
Inspect 2 excerpts
The buy command obtains a fresh quote, checks the payment policy again, writes a durable job journal, signs once and submits once.
It does not sign a new authorization or replay a purchase.
What specific restart drill steps can be derived from the WAL documentation and the buyer-recovery engineering doc for a local research-job queue, ensuring that database guarantees and application-level deduplication are clearly distinguished?Recorded excerpt
Inspect 1 excerpt
When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transactions from the WAL to the main database.
No excerpt recorded
Inspect 1 excerpt
After a connection failure or process restart, use the resume command with the same job directory.

Reference export

3 article references. Recorded titles, links and dates; observed scholarly records also include supplied authors, DOI and journal metadata with read limits. Review metadata before using in a paper. Import RIS into Zotero with File → Import.

Cited sources and references

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Spent$0.025
To creators0%
Decisions0 bought · 3 cached · 102 skipped
llm:deepseek:deepseek-v4-prolive on Arc mainnet
Decision log · 146 steps
§ IThe decision$0.025 settled / $0.05
50%$0.025 under cap
Decompose

Breaking down: "Using https://www.sqlite.org/wal.html and https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md, propose a restart drill for a local research-job queue. Distinguish database guarantees from application-level deduplication choices. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward."

Decompose

Identified 3 research target(s) to investigate; these are not established facts

Decompose

Deep mode: up to 4 paid/cached/public reads plus one bounded gap-expansion pass when needed.

Discover

Historical article search is unavailable for part of this run; available retained feed previews remain in discovery. No exhaustive archive search is claimed.

Discover

Supplied source URL https://www.sqlite.org/wal.html admitted as an unread discovery lead. No official authorship or evidence established; a supplied fragment requests a section but only a bounded whole-document read is supported.

Discover

Supplied source URL https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md admitted as an unread discovery lead. No official authorship or evidence established; a supplied fragment requests a section but only a bounded whole-document read is supported.

Discover

Web search: 4/4 planned queries attempted, 3 succeeded, 24 public page previews/leads, 1 unavailable queries. Previews and supplied URLs are discovery only. Public reads spend no USDC; model and service operating costs remain separate.

Discover

Discovered 2 verified creator source(s) and 103 free public reference(s)

Pre-check

Claim-aware portfolio (exhaustive; bounded selection, not a claim of global optimality) selected 3/10 positive proposal(s): 3 free/cache selections + 0 paid fresh selections, predicting 3/3 claim(s) above the evidence floor with $0.000000/$0.025000 fetch USDC reserved.

Pre-check

Free-preview pre-check maps an actionable source to every sub-claim (3/3); paid reading may proceed within the budget.

DecideCACHE
SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research$0 · EV 80%

SQLite WAL mode patterns and pitfalls for AI agent systems; likely covers crash recovery and safe restart practices relevant to all targets. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3; 0 fetch USDC, 1 attention slot).

DecideCACHE
https://www.sqlite.org/wal.html$0 · EV 90%

Requested original SQLite WAL documentation; directly addresses database guarantees for durability, atomicity, and recovery (target 0) and can inform restart drill steps (target 2). - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 3; 0 fetch USDC, 1 attention slot).

DecideCACHE
https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md$0 · EV 90%

Requested original buyer-recovery engineering doc; likely covers application-level deduplication choices (target 1) and restart drill steps (target 2). - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 2, 3; 0 fetch USDC, 1 attention slot).

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DOAJ journal story is unrelated to SQLite WAL or job queue recovery. - free public feed reference; no purchase or creator reward.

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Topic is Spotify Technology product introduction, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Spotify Engineering - When Can LLMs Replace Humans in A/B Tests?$0 · EV 0%

Topic is LLMs in A/B testing, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Stripe Blog - Why I tried to kill token billing (and why we kept it)$0 · EV 0%

Topic is token billing, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Stripe Blog - New trends in global card fraud: How 3D Secure and regional mandates are affecting risk$0 · EV 0%

Topic is card fraud, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Stripe Blog - OUSD is now the default stablecoin on Stripe$0 · EV 0%

Topic is stablecoin on Stripe, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Supabase - Supabase Select 2026 Recap$0 · EV 0%

Topic is Supabase Select recap, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Supabase - Supabase is acquiring Turso$0 · EV 0%

Topic is Supabase acquiring Turso, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Tailscale - Sovereign AI starts with open infrastructure$0 · EV 0%

Topic is sovereign AI infrastructure, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Tailscale - Your agent, your network: How Meta’s Muse agent works with Tailscale$0 · EV 0%

Topic is Meta's Muse agent networking, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Vicki Boykis - Antidote$0 · EV 0%

Topic is personal essay on building, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Vicki Boykis - Running local models is good now$0 · EV 0%

Topic is running local models, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
vLLM - How we trained the fastest DSpark for Kimi-K3 using GB300 NVL72$0 · EV 0%

Topic is DSpark training, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
vLLM - Improve TTFT for Multi-Turn Agentic Workloads with Bi-Directional KV Transfer in vLLM$0 · EV 0%

Topic is KV transfer for LLM serving, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Wikimedia Diff - Tech News 2026 – Issue 42$0 · EV 0%

Topic is Wikimedia tech news, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
Wikimedia Diff - Bringing Wiki Projects to the 2026 Summer Institute in Computational Social Science in Kenya$0 · EV 0%

Topic is Wiki projects at SICSS, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
x402 - Linux Foundation Appoints Michael Hursta as Executive Director of the x402 Foundation$0 · EV 0%

Topic is x402 Foundation leadership, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
x402 - Introducing x402 Batch Settlement: High-velocity Agentic Commerce$0 · EV 0%

Topic is x402 batch settlement, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
x402 - Linux Foundation Announces Operational Launch of x402 Foundation to Standardize Internet-Native Payments for AI Agents and Applications$0 · EV 0%

Topic is x402 Foundation launch, unrelated to SQLite WAL, job queues, or deduplication. - free public feed reference; no purchase or creator reward.

DecideSKIP
📄 Write-Ahead Logging (WAL) in SQLite: A White Paper on ...$0 · EV 10%

LinkedIn white paper on SQLite WAL may be relevant to target 0, but it is a secondary source and the requested original SQLite documentation is already selected; avoid redundancy. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Best Data Deduplication Software for Enterprise Data (2026) - Data Ladder$0 · EV 0%

Enterprise data deduplication software comparison; not about SQLite WAL or local job queue restart drills. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Background Jobs and Queues: 2026 Engineering Reference$0 · EV 70%

Background jobs and queues reference likely covers durable execution, idempotency, and DLQ patterns relevant to application-level deduplication and restart drills. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
SQLite's documentation about its durability properties is unclear | Hacker News$0 · EV 60%

Hacker News discussion on SQLite durability properties may clarify WAL guarantees and recovery semantics. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
What is Deduplication? The Ultimate Guide (2026)$0 · EV 0%

Generic deduplication guide focused on file/database storage, not application-level job queue deduplication. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
What Is Write-Ahead Log? | Data Replication & Distribution$0 · EV 50%

General WAL explanation may support database durability and recovery concepts, but not SQLite-specific or job queue restart drill. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
Building Durable Job Queues with SQLite$0 · EV 80%

Directly addresses durable job queues with SQLite, including claim transactions and failure recovery; highly relevant to database guarantees and application-level deduplication. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
Data Deduplication: Definition, Examples & Use Cases$0 · EV 0%

Data deduplication survivorship rules for master data, not job queue deduplication or SQLite WAL. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Mastering Write-Ahead Logging (WAL): Boost Database Durability, Speed & Crash Recovery | DB Designer$0 · EV 0%

Generic WAL design article with no SQLite-specific or job queue restart drill content. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
System Design: Message Deduplication System | by Aditi Mishra | Medium$0 · EV 0%

Message deduplication system design using Redis/Memcached; not about SQLite WAL or local queue restart. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Write-Ahead Logging Explained: Database Durability & Recovery$0 · EV 0%

YouTube video on general WAL; not SQLite-specific and unlikely to provide restart drill for local job queue. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Another look at SQLite's WAL-Reset bug - The Consensus$0 · EV 0%

Technical analysis of SQLite WAL-reset bug; may touch recovery but not job queue restart drills or deduplication choices. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
[PDF] Online Deduplication for Databases$0 · EV 0%

Academic paper on online deduplication for databases; not about SQLite WAL or job queue restart. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Write-Ahead Logging (WAL): Ensuring Data Integrity and Performance in Modern Databases$0 · EV 0%

General WAL explanation on Medium; not SQLite-specific and no job queue restart drill. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Balancing SQLite’s WAL, SYNCHRONOUS=OFF, and fsync for fast rqlite recovery – Philip O'Toole$0 · EV 0%

rqlite-specific WAL and fsync recovery; not directly about local SQLite job queue or application deduplication. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Deduplication in Distributed Systems: Myths, Realities, and Practical Solutions$0 · EV 60%

Deduplication in distributed systems discusses queue broker implementations and idempotency, relevant to application-level deduplication choices. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
Write-Ahead Logging (WAL) | The Foundation of Database Reliability | Uplatz$0 · EV 0%

YouTube video on general WAL; not SQLite-specific and no job queue restart drill. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Atomic Commit In SQLite$0 · EV 70%

Official SQLite atomic commit documentation; directly relevant to database guarantees, durability, and recovery after crash. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP
Understanding Deduplication: Improving Efficiency with Data Hygiene | Coursera$0 · EV 0%

Coursera article on data deduplication for storage efficiency; not about job queue deduplication or SQLite WAL. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
WAL cleanup | QuestDB$0 · EV 0%

QuestDB WAL cleanup documentation; different database system, not SQLite or local job queue restart drill. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
SQLite in production for a real app: WAL mode gotchas ...$0 · EV 0%

Reddit post about WAL mode gotchas is a secondary discussion, not the official SQLite WAL documentation requested. It may contain anecdotal claims but is not the authoritative source for database guarantees; the official page is already specified and can be read directly. No target is worth investigating with this source. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP
Keryx owner release notes — first-party validation — Keryx v0.27.44$0.005 · EV 0%

Release notes for Keryx v0.27.44 are not the requested buyer-recovery engineering doc and do not address SQLite WAL guarantees or restart drill steps. The abstract mentions unrelated fixes and docs. No target is worth investigating with this source.

DecideSKIP
Keryx Engineering (first-party) — Recovering a Keryx paid research job$0.002 · EV 90%

This is the exact requested buyer-recovery engineering doc, cached and full-text. It is directly relevant to application-level deduplication choices and restart drill steps (targets 1 and 2), and may also inform recovery after crash/restart in the context of a local queue. — selected https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md as the single delivery channel for this canonical document; this alias adds no independent corroboration or second attention slot. The public route has 0 access USDC and no creator citation reward; no redundant creator toll is authorized.

Fetch

READ SQLite WAL Mode: Patterns and Pitfalls for AI Agent Systems | Zylos Research - selected original public page, 0 USDC; not a cache hit.

Fetch

Read extracted public text from https://zylos.ai/research/2026-02-20-sqlite-wal-mode-ai-agent-systems/ - S1; quote matching establishes source grounding, not fact verification.

Fetch

READ https://www.sqlite.org/wal.html - selected original public page, 0 USDC; not a cache hit.

Fetch

Read extracted public text from https://www.sqlite.org/wal.html - S2; quote matching establishes source grounding, not fact verification.

Fetch

READ https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md - selected original public page, 0 USDC; not a cache hit.

Fetch

Read extracted public text from https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md - S3; quote matching establishes source grounding, not fact verification.

Re-evaluate

Sub-claim "What database guarantees does SQLite WAL mode provide for a …": 80% covered by S1, S2 — S2 directly states WAL write transactions are fast because content is written once and syncing is not required unless durability is sacrificed; it also states writers sync the WAL on every commit if PRAGMA synchronous=FULL, but omit if NORMAL. S1 states that after a crash, the first connection automatically runs WAL recovery, replaying committed transactions, typically under a second, and other connections get SQLITE_BUSY_RECOVERY. S2 states an exclusive lock is held during recovery and a third connection gets SQLITE_BUSY. Atomicity is implied by WAL's transactional nature but not explicitly defined in the retrieved passages; no explicit statement about atomic commit guarantees beyond recovery replay. Missing explicit atomicity guarantee wording and exact durability trade-off details for NORMAL vs FULL beyond sync omission.

Re-evaluate

Sub-claim "What application-level deduplication choices are relevant fo…": 50% covered by S3 — S3 describes the Keryx buyer client's application-level deduplication choices: quote does not pay or start research; buy writes a durable job journal, signs once and submits once; resume sends only GET requests and does not sign a new authorization or replay a purchase; deleting the journal and buying again can create a second debit, so ambiguous cases require operator reconciliation. This directly addresses application-level deduplication (avoiding duplicate purchases) and distinguishes it from database guarantees implicitly by relying on a durable journal. However, the retrieved passages do not explicitly contrast these choices with SQLite WAL guarantees; the distinction is not stated in the text. Missing explicit comparison between database guarantees and application-level deduplication.

Re-evaluate

Sub-claim "What specific restart drill steps can be derived from the WA…": 50% covered by S1, S2, S3 — S1 and S2 provide database-level restart steps: first connection runs WAL recovery automatically; other connections may get SQLITE_BUSY_RECOVERY and should retry; run a RESTART checkpoint during a quiet period to address checkpoint starvation. S3 provides application-level restart steps: use resume command with the same job directory; resume sends only GET requests; do not delete journal and buy again because it can create a second debit; ambiguous cases require operator reconciliation. However, the retrieved passages do not combine these into a single drill or explicitly label which steps are database guarantees vs application-level deduplication choices; the distinction must be inferred. Missing explicit integration and labeling of steps.

Re-evaluate

Coverage is adequate for the requested answer. The WAL documentation (S2) and the Zylos article (S1) provide direct evidence for durability, recovery, and atomicity aspects, while the buyer-recovery doc (S3) provides application-level deduplication choices. The remaining gaps are about explicit contrast and integration, which can be addressed by synthesis rather than additional sources. No skipped source is likely to fill these specific gaps better than the already retrieved material, and the remaining budget is very small. Buying more would not improve coverage sufficiently to justify the cost.

Sufficiency

Final check — "What database guarantees does SQLite WAL mode provide for a …": 90% assessed by S1, S2

Sufficiency

Final check — "What application-level deduplication choices are relevant fo…": 0% assessed

Sufficiency

Final check — "What specific restart drill steps can be derived from the WA…": 50% assessed by S1, S2, S3

Sufficiency

Final coverage assessment — The supplied passages from S2 (sqlite.org WAL documentation) directly address durability, atomicity, and recovery after crash/restart. S1 (zylos.ai) provides additional context on WAL recovery behavior and checkpointing. S3 (buyer-recovery doc) is about a paid research job client and does not discuss local research-job queues or deduplication; it is not relevant to the requested restart drill for a local queue. Application-level deduplication choices are not covered by any supplied passage, so that sub-claim remains unanswered. The restart drill can be partially derived from S1 and S2, but no source discusses application-level deduplication, so the drill cannot fully distinguish database guarantees from application-level choices. The assessment does not establish a complete supported answer for every requested part.

Synthesize

Synthesizing a grounded answer from 3 source(s)…

Evidence

Relevance review returned; only checked excerpts can retain support, and review cannot raise it.

Evidence

Delivering 6 summary sentence(s), each tied to one checked verbatim excerpt; complete synthesis remains unverified.

Evidence

Source-matched public excerpt (no creator reward) — S1, research target 1, proposed support 90% (estimate, not entailment): “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transa…”

Evidence

Source-matched public excerpt (no creator reward) — S2, research target 1, proposed support 80% (estimate, not entailment): “(Writers sync the WAL on every transaction commit if PRAGMA synchronous is set to FULL but omit this sync if PRAGMA synchronous is set to NO…”

Evidence

Source-matched public excerpt (no creator reward) — S3, research target 2, proposed support 70% (estimate, not entailment): “The buy command obtains a fresh quote, checks the payment policy again, writes a durable job journal, signs once and submits once.”

Evidence

Source-matched public excerpt (no creator reward) — S3, research target 2, proposed support 70% (estimate, not entailment): “It does not sign a new authorization or replay a purchase.”

Evidence

Source-matched public excerpt (no creator reward) — S1, research target 3, proposed support 80% (estimate, not entailment): “When a service restarts after a crash, the first connection to open the database automatically runs WAL recovery: replaying committed transa…”

Evidence

Source-matched public excerpt (no creator reward) — S3, research target 3, proposed support 70% (estimate, not entailment): “After a connection failure or process restart, use the resume command with the same job directory.”

Synthesize

Prepared a sentence-cited summary from 3 source(s)

Verdict

Confidence: Low — Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: 1 sub-claim remains below the evidence threshold.

Attribute

zylos.ai contributed 25% - free public reference; reward share withheld

Attribute

sqlite.org contributed 40% - free public reference; reward share withheld

Attribute

github.com contributed 35% - free public reference; reward share withheld

Settle

Keryx operating allocation $0.025000 for unclaimed public citations; sponsored by Keryx, separate from creator rewards.

Settle

Settled $0.025000 Keryx operating fee for unclaimed public citations.

Done

Done. Spent $0.025 across 1 confirmed/simulated payment(s); Keryx operating fees are separate from creator rewards.

Sign in with the original report owner to review its decisions.

Read checkpoints

Verify locally replays supported recorded query-local reserve, release, debit and hold decisions, attribution normalization and exact micro-USDC citation/author allocations. Model proposals and eligibility are asserted inputs. Query capacity is separate from signer exposure; verification does not establish funding, reward authority or settlement.

Economic families or records marked unavailable are not verified. Missing, fractional-micro or unsafe operands are never repaired; an empty family means no captured economic decision, not complete monetary coverage.

Query-local budget records
Recorded decisions can be replayed
Citation allocation records
Recorded decisions can be replayed
Author split records
Not captured

Model proposals and selected plan actions are recorded when available. Model generation is not replayed or expected to reproduce; verification checks only deterministic checkpoints.

Micro-USDC is shown only where the existing exact converter accepts the amount. Other monetary assertions are unavailable; numeric predicate replay preserves the recorded comparison.

Recorded checkpoint policy
ordinary-query-economics-v4
SHA-256 retained by this report
f9eb32bee6d8186fe53c14b9f0e54c9013c283c786eee4d68bae10df1d00a63c

Keep this digest separately from the downloaded sidecar. The offline audit command uses it as the expected digest.

Model proposal → selected plan → code checkpoint

BUY0
SKIP102
CACHE0
FREE3
ESCALATE0
UNKNOWN0

Latest terminal checkpoint outcome per recorded candidate; continuing checks and global stops are excluded. These are not settled purchases or quality scores.

Global stop checkpoints: 1 · Candidate rounds with continuing checks only: 0

CandidateRead roundModel proposedSelected planCheckpointCode resultReason / rule
910CACHECACHEselectionCONTINUEselected-plan
800CACHECACHEselectionCONTINUEselected-plan
810CACHECACHEselectionCONTINUEselected-plan
10SKIPSKIPselectionSKIPplan-skip
20SKIPSKIPselectionSKIPplan-skip
30SKIPSKIPselectionSKIPplan-skip
40SKIPSKIPselectionSKIPplan-skip
50SKIPSKIPselectionSKIPplan-skip
60SKIPSKIPselectionSKIPplan-skip
70SKIPSKIPselectionSKIPplan-skip
80SKIPSKIPselectionSKIPplan-skip
90SKIPSKIPselectionSKIPplan-skip
100SKIPSKIPselectionSKIPplan-skip
110SKIPSKIPselectionSKIPplan-skip
120SKIPSKIPselectionSKIPplan-skip
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150SKIPSKIPselectionSKIPplan-skip
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220SKIPSKIPselectionSKIPplan-skip
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240SKIPSKIPselectionSKIPplan-skip
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300SKIPSKIPselectionSKIPplan-skip
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390SKIPSKIPselectionSKIPplan-skip
400SKIPSKIPselectionSKIPplan-skip
410SKIPSKIPselectionSKIPplan-skip
420SKIPSKIPselectionSKIPplan-skip
430SKIPSKIPselectionSKIPplan-skip
440SKIPSKIPselectionSKIPplan-skip
450SKIPSKIPselectionSKIPplan-skip
460SKIPSKIPselectionSKIPplan-skip
470SKIPSKIPselectionSKIPplan-skip
480SKIPSKIPselectionSKIPplan-skip
490SKIPSKIPselectionSKIPplan-skip
500SKIPSKIPselectionSKIPplan-skip
510SKIPSKIPselectionSKIPplan-skip
520SKIPSKIPselectionSKIPplan-skip
530SKIPSKIPselectionSKIPplan-skip
540SKIPSKIPselectionSKIPplan-skip
550SKIPSKIPselectionSKIPplan-skip
560SKIPSKIPselectionSKIPplan-skip
570SKIPSKIPselectionSKIPplan-skip
580SKIPSKIPselectionSKIPplan-skip
590SKIPSKIPselectionSKIPplan-skip
600SKIPSKIPselectionSKIPplan-skip
610SKIPSKIPselectionSKIPplan-skip
620SKIPSKIPselectionSKIPplan-skip
630SKIPSKIPselectionSKIPplan-skip
640SKIPSKIPselectionSKIPplan-skip
650SKIPSKIPselectionSKIPplan-skip
660SKIPSKIPselectionSKIPplan-skip
670SKIPSKIPselectionSKIPplan-skip
680SKIPSKIPselectionSKIPplan-skip
690SKIPSKIPselectionSKIPplan-skip
700SKIPSKIPselectionSKIPplan-skip
710SKIPSKIPselectionSKIPplan-skip
720SKIPSKIPselectionSKIPplan-skip
730SKIPSKIPselectionSKIPplan-skip
740SKIPSKIPselectionSKIPplan-skip
750SKIPSKIPselectionSKIPplan-skip
760SKIPSKIPselectionSKIPplan-skip
770SKIPSKIPselectionSKIPplan-skip
780SKIPSKIPselectionSKIPplan-skip
790SKIPSKIPselectionSKIPplan-skip
820SKIPSKIPselectionSKIPplan-skip
830SKIPSKIPselectionSKIPplan-skip
840CACHESKIPselectionSKIPplan-skip
850CACHESKIPselectionSKIPplan-skip
860SKIPSKIPselectionSKIPplan-skip
870CACHESKIPselectionSKIPplan-skip
880CACHESKIPselectionSKIPplan-skip
890SKIPSKIPselectionSKIPplan-skip
900SKIPSKIPselectionSKIPplan-skip
920SKIPSKIPselectionSKIPplan-skip
930SKIPSKIPselectionSKIPplan-skip
940SKIPSKIPselectionSKIPplan-skip
950SKIPSKIPselectionSKIPplan-skip
960SKIPSKIPselectionSKIPplan-skip
970SKIPSKIPselectionSKIPplan-skip
980CACHESKIPselectionSKIPplan-skip
990SKIPSKIPselectionSKIPplan-skip
1000CACHESKIPselectionSKIPplan-skip
1010SKIPSKIPselectionSKIPplan-skip
1020SKIPSKIPselectionSKIPplan-skip
1030SKIPSKIPselectionSKIPplan-skip
1040SKIPSKIPselectionSKIPplan-skip
1050CACHESKIPselectionSKIPplan-skip
910CACHECACHEduplicateCONTINUEduplicate
910CACHECACHEpublic-routeFREEpublic-channel
800CACHECACHEduplicateCONTINUEduplicate
800CACHECACHEpublic-routeFREEpublic-channel
810CACHECACHEduplicateCONTINUEduplicate
810CACHECACHEpublic-routeFREEpublic-channel
Run context0——expansionCONTINUEexpansion
Run context1——attentionCONTINUEattention
Run context1——recommendationCONTINUEengine-recommendation
Run context1——recommendationSTOPengine-recommendation

Try a different limit

Compare only recorded budget and attention checks. Later reads, model choices and a whole alternative answer are unknown. These controls never change a live policy or authorize a purchase.

Portable research receipt

Take the evidence trail with you

One deterministic JSON bundle binds the answer, visible decisions, exact article versions, claim evidence and a Circle-settlement snapshot under SHA-256. Retain the digest to detect later changes; the self-check is not a publisher or Keryx signature.

View JSON ↗Download
Manage question privacy

Recorded purchase outcomes

Recorded purchase outcomes are unavailable for this retained snapshot. No score or zero-cost success is inferred; the original report and receipt remain available.

Ask a follow-upNew dispatch · creators paid again

Carries this dispatch’s question as context — never its answer. The next dispatch is read from sources bought for it.

From the archive

Related dispatches

Dispatch
Using https://github.com/tang-vu/keryx/releases/tag/v0.27.68, propose acceptance checks for upgrading an agent client, listing the changed behavior and one regression case; do not infer deployment from the release page. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward.
1 source cited$0.0050 recorded creator rewards
Dispatch
Using https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md, draft an incident note for an existing research job that is still pending: preserve its identity and identify what evidence the operator must obtain before calling it completed. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward.
1 source cited$0.0000 recorded creator rewards
Dispatch
Using https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-buyer-recovery.md, make a two-column decision table for retrying a GET versus resubmitting a paid research request after a timeout. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward.
1 source cited$0.0000 recorded creator rewards
Dispatch
Using https://www.w3.org/TR/prov-overview/ and https://github.com/tang-vu/keryx/blob/main/docs/engineering/2026-09-08-citation-rewards.md, propose provenance fields linking a source version, a quotation and a payment record; keep a proposed schema separate from platform guarantees. Cite only material actually retrieved; keep unread sources and unsupported points explicit. Do not force a purchase or a reward.
1 source cited$0.0000 recorded creator rewards
Browse the full archive ▸